Index: src/kmk/kmkbuiltin/expr.c
===================================================================
--- src/kmk/kmkbuiltin/expr.c.orig
+++ src/kmk/kmkbuiltin/expr.c
@@ -304,6 +304,8 @@ eval6(void)
 		return v;
 	} else {
 		error();
+        /* dummy return in order to make the build checks happy (this will never be reached) */
+        return NULL;
 	}
 	/* NOTREACHED */
 }