diff --git a/engine/Makefile b/engine/Makefile
index e1e95067a..fc952ab0f 100644
--- a/engine/Makefile
+++ b/engine/Makefile
@@ -1664,13 +1664,18 @@ ifeq ($(FTE_TARGET),web)
 #	ASMJS_MEMORY?=1073741824 #1025mb
 #	ASMJS_MEMORY?=2147483648 #2048mb
 	WEB_MEMORY?=$(ASMJS_MEMORY)
-	JSLIBS=--js-library web/ftejslib.js -s LEGACY_GL_EMULATION=0
-	EMCC_ARGS=$(JSLIBS) $(WEB_PREJS) -s ERROR_ON_UNDEFINED_SYMBOLS=1
-	RELEASE_CFLAGS=-DOMIT_QCC -DGL_STATIC -DFTE_TARGET_WEB
-	DEBUG_CFLAGS=-g4 -DOMIT_QCC -DGL_STATIC -DFTE_TARGET_WEB
-	RELEASE_LDFLAGS=-O3	-s TOTAL_MEMORY=$(ASMJS_MEMORY) $(EMCC_ARGS) -s NO_FILESYSTEM=1
-#	RELEASE_LDFLAGS=-O1	-s TOTAL_MEMORY=$(WEB_MEMORY) $(EMCC_ARGS)
-	DEBUG_LDFLAGS=-O0 -g4 -s TOTAL_MEMORY=$(WEB_MEMORY) $(EMCC_ARGS) -s SAFE_HEAP=1 -s ALIASING_FUNCTION_POINTERS=0 -s ASSERTIONS=2 -s NO_FILESYSTEM=1
+	JSLIBS=--js-library web/ftejslib.js
+	EMCC_CFLAGS= -DFTE_TARGET_WEB
+	EMCC_LDFLAGS=$(EMCC_CFLAGS) $(JSLIBS) $(WEB_PREJS)
+	EMCC_CFLAGS+= -s BINARYEN_TRAP_MODE='clamp'		#fix bigfloat->int rounding crashes
+	EMCC_CFLAGS+= -s LEGACY_GL_EMULATION=0			#simplify the opengl wrappers.
+	EMCC_CFLAGS+= -s NO_FILESYSTEM=1				#we have our own.
+   	EMCC_LDFLAGS+=-s ERROR_ON_UNDEFINED_SYMBOLS=1	#fairly obvious. no runtime errors please.
+	RELEASE_CFLAGS=-DOMIT_QCC -DGL_STATIC $(EMCC_CFLAGS)
+	DEBUG_CFLAGS=-g4 -DOMIT_QCC -DGL_STATIC $(EMCC_CFLAGS)
+	RELEASE_LDFLAGS=-O3	-s TOTAL_MEMORY=$(ASMJS_MEMORY) $(EMCC_LDFLAGS)
+#	RELEASE_LDFLAGS=-O1	-s TOTAL_MEMORY=$(WEB_MEMORY) $(EMCC_LDFLAGS)
+	DEBUG_LDFLAGS=-O0 -g4 -s TOTAL_MEMORY=$(WEB_MEMORY) $(EMCC_LDFLAGS) -s SAFE_HEAP=1 -s ALIASING_FUNCTION_POINTERS=0 -s ASSERTIONS=2
 	CC?=emcc
 	CXX?=emcc
 	#BASELDFLAGS=