diff --git a/build/toolchain.emscripten.mak b/build/toolchain.emscripten.mak
index 1697f1a5e..8d327ae7b 100644
--- a/build/toolchain.emscripten.mak
+++ b/build/toolchain.emscripten.mak
@@ -1,7 +1,6 @@
 CC = emcc
 CXX = emcc
 LD = emcc
-SIZE = size
 
-SFLAGS = -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1
-LDFLAGS =  -Oz -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1 -s EXPORTED_FUNCTIONS="['_main', '_IonEventsEmscriptenPushEvent']"
+SFLAGS += -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1
+LDFLAGS +=  -Oz -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1 -s EXPORTED_FUNCTIONS="['_main', '_IonEventsEmscriptenPushEvent']"