diff --git a/cf/krb-version.m4 b/cf/krb-version.m4
index 8581dbb69..6a48ae6da 100644
--- a/cf/krb-version.m4
+++ b/cf/krb-version.m4
@@ -6,8 +6,8 @@ dnl
 AC_DEFUN(AC_KRB_VERSION,[
 dnl AC_OUTPUT_COMMANDS([
 cat > include/newversion.h.in <<FOOBAR
-char *${PACKAGE}_long_version = "@(#)\$Version: $PACKAGE-$VERSION by @USER@ on @HOST@ ($host) @DATE@ \$";
-char *${PACKAGE}_version = "$PACKAGE-$VERSION";
+const char *${PACKAGE}_long_version = "@(#)\$Version: $PACKAGE-$VERSION by @USER@ on @HOST@ ($host) @DATE@ \$";
+const char *${PACKAGE}_version = "$PACKAGE-$VERSION";
 FOOBAR
 
 if test -f include/version.h && cmp -s include/newversion.h.in include/version.h.in; then