diff --git a/templates/vst3/src/vst3.c b/templates/vst3/src/vst3.c
index 8e67915..b4bf45f 100644
--- a/templates/vst3/src/vst3.c
+++ b/templates/vst3/src/vst3.c
@@ -613,7 +613,7 @@ static Steinberg_tresult pluginProcess(void* thisInterface, struct Steinberg_Vst
 				break;
 			case Steinberg_Vst_Event_EventTypes_kNoteOffEvent:
 			{
-				const uint8_t data[3] = { 0x90 | ev.Steinberg_Vst_Event_noteOff.channel, ev.Steinberg_Vst_Event_noteOff.pitch, (uint8_t)(127.f * ev.Steinberg_Vst_Event_noteOff.velocity) };
+				const uint8_t data[3] = { 0x80 | ev.Steinberg_Vst_Event_noteOff.channel, ev.Steinberg_Vst_Event_noteOff.pitch, (uint8_t)(127.f * ev.Steinberg_Vst_Event_noteOff.velocity) };
 				plugin_midi_msg_in(&p->p, midiInIndex[ev.busIndex], data);
 			}
 				break;
diff --git a/templates/web-make/Makefile b/templates/web-make/Makefile
index bfdda9f..8dec608 100644
--- a/templates/web-make/Makefile
+++ b/templates/web-make/Makefile
@@ -16,6 +16,11 @@ LDFLAGS_ALL = \
 	-Wl,--lto-O3 \
 	-Wl,-strip-all \
 	-Wl,--export-table \
+	-Wl,--export=malloc \
+	-Wl,--export=realloc \
+	-Wl,--export=calloc \
+	-Wl,--export=free \
+	-Wl,--export=memset \
 	-Wl,--export=processor_new \
 	-Wl,--export=processor_free \
 	-Wl,--export=processor_get_x_buf \
diff --git a/templates/web/src/walloc.c b/templates/web/src/walloc.c
index 68cb155..3ea4b2d 100644
--- a/templates/web/src/walloc.c
+++ b/templates/web/src/walloc.c
@@ -5,6 +5,7 @@
 #include "walloc.h"
 
 #include <stdint.h>
+#include "memset.h"
 
 extern unsigned char __heap_base;
 
@@ -109,6 +110,17 @@ void *realloc(void *ptr, size_t size) {
 	return p;
 }
 
+void *calloc(size_t nmemb, size_t size) {
+	if (nmemb == 0 || SIZE_MAX / nmemb > size || (SIZE_MAX / nmemb == size && SIZE_MAX % nmemb != 0))
+		return NULL;
+	size_t s = nmemb * size;
+	void *m = malloc(s);
+	if (m == NULL)
+		return NULL;
+	memset(m, 0, s);
+	return m;
+}
+
 void free(void *ptr) {
 	header *h = (header *)((char *)ptr - sizeof(header));
 	h->free = 1;
diff --git a/templates/web/src/walloc.h b/templates/web/src/walloc.h
index d65dcb8..f4a2bb9 100644
--- a/templates/web/src/walloc.h
+++ b/templates/web/src/walloc.h
@@ -13,6 +13,7 @@ extern "C" {
 
 void *malloc(size_t size);
 void *realloc(void *ptr, size_t size);
+void *calloc(size_t nmemb, size_t size);
 void free(void *ptr);
 
 #ifdef __cplusplus