diff --git a/cde/config/cf/OpenBSD.cf b/cde/config/cf/OpenBSD.cf
index d2b171893..6f1310d7f 100644
--- a/cde/config/cf/OpenBSD.cf
+++ b/cde/config/cf/OpenBSD.cf
@@ -148,6 +148,11 @@ XCOMM operating system:  OSName (OSMajorVersion./**/OSMinorVersion./**/OSTeenyVe
 # endif
 #endif
 
+/* Use installed versions of Xm and X11 */
+#if OSMajorVersion >= 6
+# define UseInstalledX11        YES
+#endif
+
 /*
  * Compiler Features
  */
diff --git a/cde/config/imake/Makefile.ini b/cde/config/imake/Makefile.ini
index 30e311c08..f05a17de3 100644
--- a/cde/config/imake/Makefile.ini
+++ b/cde/config/imake/Makefile.ini
@@ -11,7 +11,7 @@
 BOOTSTRAPCFLAGS = 
 CC = cc
 CDEBUGFLAGS = -O
-INCLUDES = -I../../include -I/usr/local/include/X11 -I/usr/include/X11 -I../../imports/x11/include/X11
+INCLUDES = -I../../include -I/usr/local/include/X11 -I/usr/include/X11 -I/usr/X11R6/include/X11 -I../../imports/x11/include/X11
 CFLAGS = $(BOOTSTRAPCFLAGS) $(CDEBUGFLAGS) $(INCLUDES)
 SHELL = /bin/sh
 RM = rm -f