diff --git a/src/java_lang_Class.cc b/src/java_lang_Class.cc
index 7d1a4aa..d93d3e6 100644
--- a/src/java_lang_Class.cc
+++ b/src/java_lang_Class.cc
@@ -94,7 +94,7 @@
 }
 
 bool IsVisibleField(Field* f, bool public_only) {
-  if (public_only && ~f->IsPublic()) {
+  if (public_only && !f->IsPublic()) {
     return false;
   }
   f->InitJavaFields();