diff --git a/templates/android/src/data.h b/templates/android/src/data.h
index 4c99f3a..de2c91d 100644
--- a/templates/android/src/data.h
+++ b/templates/android/src/data.h
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2024 Orastron Srl unipersonale
+ * Copyright (C) 2024, 2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -83,3 +83,7 @@ static struct {
 #endif
 
 #define JNI_FUNC(x) Java_{{=it.android.javaPackageName.replaceAll("_", "_1").replaceAll(".", "_")}}_MainActivity_##x
+
+{{?it.product.state && it.product.state.dspCustom}}
+#define STATE_DSP_CUSTOM
+{{?}}
diff --git a/templates/android/src/jni.cpp b/templates/android/src/jni.cpp
index a65dfa5..57fdd97 100644
--- a/templates/android/src/jni.cpp
+++ b/templates/android/src/jni.cpp
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2023, 2024 Orastron Srl unipersonale
+ * Copyright (C) 2023-2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -189,6 +189,10 @@ JNIEXPORT jboolean JNICALL
 JNI_FUNC(nativeAudioStart)(JNIEnv* env, jobject thiz) {
 	(void)env;
 	(void)thiz;
+#ifdef STATE_DSP_CUSTOM
+	(void)plugin_state_load;
+	(void)plugin_state_save;
+#endif
 
 #if NUM_CHANNELS_IN + NUM_CHANNELS_OUT > 0
 # if NUM_CHANNELS_IN == 0
diff --git a/templates/cmd/src/data.h b/templates/cmd/src/data.h
index ec9a573..7ea8781 100644
--- a/templates/cmd/src/data.h
+++ b/templates/cmd/src/data.h
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2024 Orastron Srl unipersonale
+ * Copyright (C) 2024, 2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -83,3 +83,7 @@ static struct {
 {{~}}
 };
 #endif
+
+{{?it.product.state && it.product.state.dspCustom}}
+#define STATE_DSP_CUSTOM
+{{?}}
diff --git a/templates/cmd/src/main.c b/templates/cmd/src/main.c
index 6f598f2..b5b50aa 100644
--- a/templates/cmd/src/main.c
+++ b/templates/cmd/src/main.c
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2024 Orastron Srl unipersonale
+ * Copyright (C) 2024, 2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -162,6 +162,11 @@ float clampf(float x, float m, float M) {
 }
 
 int main(int argc, char * argv[]) {
+#ifdef STATE_DSP_CUSTOM
+	(void)plugin_state_load;
+	(void)plugin_state_save;
+#endif
+
 #if PARAMETERS_N > 0
 	for (size_t i = 0; i < PARAMETERS_N; i++)
 		param_values[i] = param_data[i].def;
diff --git a/templates/daisy-seed/src/data.h b/templates/daisy-seed/src/data.h
index ea0e3ec..69a7f39 100644
--- a/templates/daisy-seed/src/data.h
+++ b/templates/daisy-seed/src/data.h
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2024 Orastron Srl unipersonale
+ * Copyright (C) 2024, 2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -98,3 +98,7 @@ static int midi_cc_maps[NUM_PARAMETERS] = { {{~it.daisy_seed.midiCCMaps :p}}{{=p
 # endif
 
 #endif
+
+{{?it.product.state && it.product.state.dspCustom}}
+#define STATE_DSP_CUSTOM
+{{?}}
diff --git a/templates/daisy-seed/src/main.cpp b/templates/daisy-seed/src/main.cpp
index 43253b3..2be97b9 100644
--- a/templates/daisy-seed/src/main.cpp
+++ b/templates/daisy-seed/src/main.cpp
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2023, 2024 Orastron Srl unipersonale
+ * Copyright (C) 2023-2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -150,6 +150,11 @@ static void AudioCallback(
 }
 
 int main() {
+#ifdef STATE_DSP_CUSTOM
+	(void)plugin_state_load;
+	(void)plugin_state_save;
+#endif
+
 	hardware.Configure();
 	hardware.Init();
 
diff --git a/templates/ios/src/data.h b/templates/ios/src/data.h
index 8b3d2a1..b5d9594 100644
--- a/templates/ios/src/data.h
+++ b/templates/ios/src/data.h
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2024 Orastron Srl unipersonale
+ * Copyright (C) 2024, 2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -81,3 +81,7 @@ static struct {
 {{~}}
 };
 #endif
+
+{{?it.product.state && it.product.state.dspCustom}}
+#define STATE_DSP_CUSTOM
+{{?}}
diff --git a/templates/ios/src/native.mm b/templates/ios/src/native.mm
index b7c1ebe..5b87d5c 100644
--- a/templates/ios/src/native.mm
+++ b/templates/ios/src/native.mm
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2023, 2024 Orastron Srl unipersonale
+ * Copyright (C) 2023-2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -190,6 +190,11 @@ void (^midiReceiveBlock)(const MIDIEventList *evtlist, void *srcConnRefCon) = ^(
 
 extern "C"
 char audioStart() {
+#ifdef STATE_DSP_CUSTOM
+	(void)plugin_state_load;
+	(void)plugin_state_save;
+#endif
+
 #if NUM_CHANNELS_IN + NUM_CHANNELS_OUT > 0
 # if NUM_CHANNELS_IN == 0
 	deviceConfig = ma_device_config_init(ma_device_type_playback);
diff --git a/templates/web/src/data.h b/templates/web/src/data.h
index d97fd2d..48c6258 100644
--- a/templates/web/src/data.h
+++ b/templates/web/src/data.h
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2024 Orastron Srl unipersonale
+ * Copyright (C) 2024, 2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -44,3 +44,7 @@ static size_t param_out_index[DATA_PRODUCT_PARAMETERS_OUTPUT_N] = {
 	{{~it.product.parameters :p:i}}{{?p.direction == "output"}}{{=i}}, {{?}}{{~}}
 };
 #endif
+
+{{?it.product.state && it.product.state.dspCustom}}
+#define DATA_STATE_DSP_CUSTOM
+{{?}}
diff --git a/templates/web/src/processor.c b/templates/web/src/processor.c
index a559be3..de9f9e9 100644
--- a/templates/web/src/processor.c
+++ b/templates/web/src/processor.c
@@ -1,7 +1,7 @@
 /*
  * Tibia
  *
- * Copyright (C) 2022-2024 Orastron Srl unipersonale
+ * Copyright (C) 2022-2025 Orastron Srl unipersonale
  *
  * Tibia is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -46,6 +46,11 @@ typedef struct {
 } instance;
 
 instance * processor_new(float sample_rate) {
+#ifdef DATA_STATE_DSP_CUSTOM
+	(void)plugin_state_load;
+	(void)plugin_state_save;
+#endif
+
 	instance * i = malloc(sizeof(instance));
 	if (i == NULL)
 		return NULL;
diff --git a/test/plugin.h b/test/plugin.h
index b815ca0..6ba7c33 100644
--- a/test/plugin.h
+++ b/test/plugin.h
@@ -19,7 +19,6 @@
  */
 
 #include <stdint.h>
-#include <math.h>
 
 typedef struct plugin {
 	float			sample_rate;
@@ -154,6 +153,12 @@ static int plugin_state_save(plugin *instance, const plugin_state_callbacks *cbs
 	return cbs->write(cbs->handle, (const char *)data, 13);
 }
 
+static char x_isnan(float x) {
+	union { uint32_t u; float f; } v;
+	v.f = x;
+	return ((v.u & 0x7f800000) == 0x7f800000) && (v.u & 0x7fffff);
+}
+
 static int plugin_state_load(const plugin_state_callbacks *cbs, const char *data, size_t length) {
 	if (length != 13)
 		return -1;
@@ -162,7 +167,7 @@ static int plugin_state_load(const plugin_state_callbacks *cbs, const char *data
 	const float delay = parse_float(d + 4);
 	const float cutoff = parse_float(d + 8);
 	const float bypass = d[12] ? 1.f : 0.f;
-	if (isnan(gain) || isnan(delay) || isnan(cutoff))
+	if (x_isnan(gain) || x_isnan(delay) || x_isnan(cutoff))
 		return -1;
 	cbs->lock(cbs->handle);
 	cbs->set_parameter(cbs->handle, plugin_parameter_gain, gain);