diff --git a/src/s/hpux9.h b/src/s/hpux9.h
index c622a392b05..a64de765b37 100644
--- a/src/s/hpux9.h
+++ b/src/s/hpux9.h
@@ -44,8 +44,11 @@
 #define C_SWITCH_X_SYSTEM -I/usr/include/Motif1.2
 #define LD_SWITCH_X_DEFAULT -L/usr/lib/Motif1.2
 
-/* HP-UX doesn't supply nor need Xmu.  */
+#if 0
+/* HP-UX doesn't supply Xmu, and someone said we don't need it.  But
+   we do seem to need it, with both Athena widgets and Motif.  Too bad.  */
 #define LIBXMU
+#endif
 
 /* zoo@armadillo.com says we don't need -lXext in HPUX 9.  */
 #undef LIBX11_SYSTEM