diff --git a/reactos/lib/3rdparty/zlib/zlib.mak b/reactos/lib/3rdparty/zlib/zlib.mak
index 6073a144deb..3f88b3127b6 100755
--- a/reactos/lib/3rdparty/zlib/zlib.mak
+++ b/reactos/lib/3rdparty/zlib/zlib.mak
@@ -32,8 +32,8 @@ ZLIB_HOST_SOURCES = $(addprefix $(ZLIB_BASE_), \
 ZLIB_HOST_OBJECTS = \
 	$(addprefix $(INTERMEDIATE_), $(ZLIB_HOST_SOURCES:.c=.host.o))
 
-ZLIB_HOST_CFLAGS = -MMD -O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
-  -Wstrict-prototypes -Wmissing-prototypes $(TOOLS_CPPFLAGS)
+ZLIB_HOST_CFLAGS = -O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+	-Wstrict-prototypes -Wmissing-prototypes $(TOOLS_CPPFLAGS)
 
 $(ZLIB_HOST_TARGET): $(ZLIB_HOST_OBJECTS) | $(ZLIB_OUT)
 	$(ECHO_AR)