diff --git a/wmtime/wmtime/Makefile b/wmtime/wmtime/Makefile
index 26b8571..a1c3c58 100755
--- a/wmtime/wmtime/Makefile
+++ b/wmtime/wmtime/Makefile
@@ -7,13 +7,13 @@ OBJS =	wmtime.o \
 XPMS = wmtime-master.xpm wmtime-mask.xbm
 
 CC = gcc
-CFLAGS = -O2
+CFLAGS += -O2
 
 .c.o:
-	$(CC) $(CFLAGS) -c -Wall $< -o $*.o
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -c -Wall $< -o $*.o
 
 wmtime: $(OBJS) $(XPMS)
-	$(CC) $(CFLAGS) -o wmtime $(OBJS) $(LIBDIR) $(LIBS)
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o wmtime $(OBJS) $(LIBDIR) $(LIBS)
 
 clean::
 	for i in $(OBJS) ; do \