--- a/GUI/xephem/Makefile
+++ b/GUI/xephem/Makefile
@@ -30,7 +30,7 @@
 endif
 
 # for linux and Apple OS X
-XLIBS = -lXm -lXp -lXt -lXext -lXmu -lX11
+XLIBS = -lXm -lXt -lXext -lXmu -lX11
 CFLAGS := $(LIBINC) $(CFLAGS)
 LIBS = $(LIBLNK) $(XLIBS) $(LIBLIB) -lm