diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java
index 8fee9d8a9bd..bc5dd6c56ac 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java
@@ -5262,4 +5262,15 @@ public class AST2Tests extends AST2BaseTest {
 			bh.assertNonProblem("a3=", 2);
 		}
 	}
+	
+	// void test() {
+	//    char* p;
+	//    if (__builtin_types_compatible_p(typeof(p), char[]))) {
+	//    }
+	// }
+	public void testBuiltinTypesCompatible_bug241570() throws Exception  {
+		for (ParserLanguage lang : ParserLanguage.values()) {
+			parseAndCheckBindings(getAboveComment(), lang, true);
+		}
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java
index 8166319eabb..30b7335ee0e 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/parser/GNUScannerExtensionConfiguration.java
@@ -38,6 +38,7 @@ public abstract class GNUScannerExtensionConfiguration extends AbstractScannerEx
 
 		addMacro("__builtin_va_arg(ap,type)", "*(type *)ap");
 		addMacro("__builtin_constant_p(exp)", "0");
+		addMacro("__builtin_types_compatible_p(x,y)", "__builtin_types_compatible_p(sizeof(x),sizeof(y)");
 		
     	addPreprocessorKeyword(Keywords.cINCLUDE_NEXT, IPreprocessorDirective.ppInclude_next); 
     	addPreprocessorKeyword(Keywords.cIMPORT, IPreprocessorDirective.ppImport);