Index: src/krb5-config.in
===================================================================
--- src/krb5-config.in	(revision 1789)
+++ src/krb5-config.in	(working copy)
@@ -165,7 +165,11 @@
 fi
 
 if test -n "$do_cflags"; then
-    echo "-I${includedir}"
+    if test x"$includedir" != x"/usr/include" ; then
+        echo "-I${includedir}"
+    else
+        echo ''
+    fi
 fi