diff --git a/build/toolchain.emscripten.mak b/build/toolchain.emscripten.mak
index 8b7c2f1bb..d48cc3b01 100644
--- a/build/toolchain.emscripten.mak
+++ b/build/toolchain.emscripten.mak
@@ -71,7 +71,7 @@ _mp_import_name \
 _mp_parse_compile_execute
 
 EMTERPRETIFY_WHITELIST = $(foreach sym,$(EMSCRIPTEN_ASYNC_SYMBOLS),"$(sym)",)END
-EMFLAGS = -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1 -s EMTERPRETIFY_WHITELIST='[$(EMTERPRETIFY_WHITELIST:,END=)]'
+EMFLAGS = -s PRECISE_F32=1 -s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1 -s EMTERPRETIFY_WHITELIST='[$(EMTERPRETIFY_WHITELIST:,END=)]'
 
 ifeq ($(DEBUG),1)
 EMFLAGS += --profiling-funcs