diff --git a/Makefile b/Makefile
index 2b65a44..3b1cbc9 100644
--- a/Makefile
+++ b/Makefile
@@ -237,6 +237,7 @@ else ifeq ($(platform), switch)
 # emscripten
 else ifeq ($(platform), emscripten)
 	TARGET := $(TARGET_NAME)_libretro_$(platform).bc
+	STATIC_LINKING=1
 
 # Windows MSVC 2017 all architectures
 else ifneq (,$(findstring windows_msvc2017,$(platform)))
@@ -527,7 +528,9 @@ ifeq ($(DEBUG),1)
       FLAGS += -O0 -g
    endif
 else
-   ifneq (,$(findstring msvc,$(platform)))
+   ifeq ($(platform), emscripten)
+      FLAGS    += -O3 -DNDEBUG
+   else ifneq (,$(findstring msvc,$(platform)))
       CFLAGS   += -MT
       CXXFLAGS += -MT
       CFLAGS   += -O2 -DNDEBUG