diff --git a/qw_client/Makefile.in b/qw_client/Makefile.in
index eadacdd..ca058f2 100644
--- a/qw_client/Makefile.in
+++ b/qw_client/Makefile.in
@@ -217,7 +217,7 @@ ifneq ($(X11QUAKE),)
 # Map the list of source files into a list of object files
 OBJSquake-x11 = $(patsubst %,$(BUILD_DIR)/x11/%,$(addsuffix .@OBJEXT@, $(basename $(ALL_X11_SRC) .c .s)))
 
-X11_CFLAGS  = -DX11 $(X_CFLAGS)
+X11_CFLAGS  = -DX11 @X_CFLAGS@
 X11_LDFLAGS = @X_LIBS@ -lX11 @X11_SHM_LIB@ @X_EXTRA_LIBS@ -lm
 
 # This can be thought of as a macro that makes sure that the x11
diff --git a/uquake/Makefile.in b/uquake/Makefile.in
index 17cdb81..34024a3 100644
--- a/uquake/Makefile.in
+++ b/uquake/Makefile.in
@@ -206,7 +206,7 @@ ifneq ($(X11QUAKE),)
 # Map the list of source files into a list of object files
 OBJSquake-x11 = $(patsubst %,$(BUILD_DIR)/x11/%,$(addsuffix .@OBJEXT@, $(basename $(ALL_X11_SRC) .c .s)))
 
-X11_CFLAGS  = -DX11 $(X_CFLAGS)
+X11_CFLAGS  = -DX11 @X_CFLAGS@
 X11_LDFLAGS = @X_LIBS@ -lX11 @X11_SHM_LIB@ @X_EXTRA_LIBS@ -lm
 
 # This can be thought of as a macro that makes sure that the x11