Index: head/lib/libkvm/kvm.c
===================================================================
--- head/lib/libkvm/kvm.c
+++ head/lib/libkvm/kvm.c
@@ -476,7 +476,7 @@
 		len -= cw;
 	}
 
-	return (cp - (char *)buf);
+	return (cp - (const char *)buf);
 }
 
 int