diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
index d6afa8b3022..7cd2e589369 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
@@ -5713,4 +5713,14 @@ public class AST2TemplateTests extends AST2BaseTest {
 	public void testPartialClassTemplateSpecUsingDefaultArgument_367997() throws Exception {
 		parseAndCheckBindings();
 	}
+	
+	//	struct two { char x[2]; };
+	//	two check(...);
+	//	char check(int);
+	//	template <int> struct foo {};
+	//	template <> struct foo<1> { typedef int type; };
+	//	typedef foo<sizeof(check(0))>::type t;  // ERROR HERE
+	public void testValueForSizeofExpression_368309() throws Exception {
+		parseAndCheckBindings();
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java
index 5d212fc4ee1..0e635c650f3 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java
@@ -580,13 +580,16 @@ public class Value implements IValue {
 		final int unaryOp= ue.getOperator();
 
 		if (unaryOp == IASTUnaryExpression.op_sizeof) {
-			IType type = ue.getExpressionType();
-			ASTTranslationUnit ast = (ASTTranslationUnit) ue.getTranslationUnit();
-			SizeofCalculator calculator = ast.getSizeofCalculator();
-			SizeAndAlignment info = calculator.sizeAndAlignment(type);
-			if (info == null)
-				throw UNKNOWN_EX;
-			return info.size;
+			final IASTExpression operand = ue.getOperand();
+			if (operand != null) {
+				IType type = operand.getExpressionType();
+				ASTTranslationUnit ast = (ASTTranslationUnit) ue.getTranslationUnit();
+				SizeofCalculator calculator = ast.getSizeofCalculator();
+				SizeAndAlignment info = calculator.sizeAndAlignment(type);
+				if (info != null)
+					return info.size;
+			}
+			throw UNKNOWN_EX;
 		}
 
 		if (unaryOp == IASTUnaryExpression.op_amper || unaryOp == IASTUnaryExpression.op_star ||