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 48245376d38..1ca040fd7e4 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
@@ -21,6 +21,7 @@ import static org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory.LVALUE;
 import static org.eclipse.cdt.core.dom.ast.IASTExpression.ValueCategory.XVALUE;
 import static org.eclipse.cdt.core.parser.ParserLanguage.CPP;
 import static org.eclipse.cdt.core.parser.tests.VisibilityAsserts.assertVisibility;
+import static org.junit.Assert.assertNotEquals;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -9079,6 +9080,15 @@ public class AST2CPPTests extends AST2TestBase {
 		long BSize = SizeofCalculator.getSizeAndAlignment(B, nameB).size;
 		assertEquals(pointerSize, BSize);
 	}
+	
+	//	struct waldo {};
+	public void testSizeofEmptyStruct_457770() throws Exception {
+		BindingAssertionHelper bh = getAssertionHelper();
+		IASTName nameWaldo = bh.findName("waldo");
+		ICPPClassType waldo = (ICPPClassType) nameWaldo.resolveBinding();
+		long waldoSize = SizeofCalculator.getSizeAndAlignment(waldo, nameWaldo).size;
+		assertNotEquals(0, waldoSize);
+	}
 
 	//	template <bool> struct B {};
 	//	template <>
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/SizeofCalculator.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/SizeofCalculator.java
index 7ad41a90f8e..0be0ea437d7 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/SizeofCalculator.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/SizeofCalculator.java
@@ -329,8 +329,9 @@ public class SizeofCalculator {
 			if (maxAlignment < info.alignment)
 				maxAlignment = info.alignment;
 		}
-		if (size > 0)
-			size += maxAlignment - (size - 1) % maxAlignment - 1;
+		if (size == 0)  // a structure cannot have size 0
+			size = 1;
+		size += maxAlignment - (size - 1) % maxAlignment - 1;
 		return new SizeAndAlignment(size, maxAlignment);
 	}