diff --git a/src/utils/os_divers.c b/src/utils/os_divers.c
index 7b9f18e22d..e1d513c316 100644
--- a/src/utils/os_divers.c
+++ b/src/utils/os_divers.c
@@ -133,7 +133,7 @@ u32 gf_gpac_abi_micro()
 }
 
 
-#ifndef WIN32
+#if !defined(WIN32) && !defined(GPAC_CONFIG_EMSCRIPTEN)
 
 GF_EXPORT
 u32 gf_sys_clock()
@@ -153,6 +153,23 @@ u64 gf_sys_clock_high_res()
 
 #endif
 
+#ifdef GPAC_CONFIG_EMSCRIPTEN
+#include <emscripten/emscripten.h>
+
+GF_EXPORT
+u32 gf_sys_clock()
+{
+	return (u32)(emscripten_get_now() - sys_start_time);
+}
+
+GF_EXPORT
+u64 gf_sys_clock_high_res()
+{
+	return (long long)(emscripten_get_now() * 1000.0) - sys_start_time_hr;
+}
+
+#endif
+
 Bool gf_sys_enable_remotery(Bool start, Bool is_shutdown);
 
 static Bool gpac_disable_rti = GF_FALSE;