diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
index 443e4bae6b1..2c3fa8348d4 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
@@ -9334,4 +9334,15 @@ public class AST2CPPTests extends AST2BaseTest {
 	public void testResolutionInTrailingReturnType_333256() throws Exception {
 		parseAndCheckBindings();
 	}
+	
+	//	struct CHAINER {
+	//	    CHAINER const & operator,(int x) const;
+	//	};
+	//	void test(const CHAINER& x) {
+	//	    CHAINER c;
+	//	    test((c,0,1));
+	//	}
+	public void testOverloadedCommaOpWithConstClassRef_334955() throws Exception {
+		parseAndCheckBindings();
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
index 38e8cf357d9..2068d65eee9 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
@@ -3208,7 +3208,7 @@ public class CPPSemantics {
     	dummy.setParent(first);
     	
     	IASTExpression[] args = new IASTExpression[] { dummy , second };
-    	return findOverloadedOperator(dummy, args, lookupType, OverloadableOperator.COMMA, LookupMode.LIMITED_GLOBALS);
+    	return findOverloadedOperator(dummy, args, op1type, OverloadableOperator.COMMA, LookupMode.LIMITED_GLOBALS);
     }
 
     private static enum LookupMode {NO_GLOBALS, LIMITED_GLOBALS, ALL_GLOBALS}