diff --git a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/selection/CPPSelectionTestsAnyIndexer.java b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/selection/CPPSelectionTestsAnyIndexer.java
index bc2aab7d1fe..c0cec4cdf49 100644
--- a/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/selection/CPPSelectionTestsAnyIndexer.java
+++ b/core/org.eclipse.cdt.ui.tests/ui/org/eclipse/cdt/ui/tests/text/selection/CPPSelectionTestsAnyIndexer.java
@@ -1272,4 +1272,15 @@ public abstract class CPPSelectionTestsAnyIndexer extends BaseSelectionTestsInde
         assertEquals(hfile.getLocation().toOSString(), location.getFileName());
         assertEquals(hoffset, location.getNodeOffset());
 	}
+	
+    //	int waldo(int a, decltype(a) b);
+    public void testFunctionParameterReferencingPreviousParameter_432703() throws Exception {
+        String code = getAboveComment();
+        IFile file = importFile("test.cpp", code);
+        waitUntilFileIsIndexed(index, file);
+        
+        int offset= code.indexOf("a)"); 
+        IASTNode def = testF3(file, offset + 1);
+        assertTrue(def instanceof IASTName);
+    }
 }
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/search/actions/OpenDeclarationsJob.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/search/actions/OpenDeclarationsJob.java
index f7faf7fa1c7..2cca0472454 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/search/actions/OpenDeclarationsJob.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/search/actions/OpenDeclarationsJob.java
@@ -40,7 +40,9 @@ import org.eclipse.cdt.core.dom.IName;
 import org.eclipse.cdt.core.dom.ast.ASTNameCollector;
 import org.eclipse.cdt.core.dom.ast.DOMException;
 import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
+import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
 import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
+import org.eclipse.cdt.core.dom.ast.IASTFunctionDeclarator;
 import org.eclipse.cdt.core.dom.ast.IASTFunctionDefinition;
 import org.eclipse.cdt.core.dom.ast.IASTFunctionStyleMacroParameter;
 import org.eclipse.cdt.core.dom.ast.IASTImplicitName;
@@ -50,6 +52,7 @@ import org.eclipse.cdt.core.dom.ast.IASTNode;
 import org.eclipse.cdt.core.dom.ast.IASTNodeSelector;
 import org.eclipse.cdt.core.dom.ast.IASTPreprocessorFunctionStyleMacroDefinition;
 import org.eclipse.cdt.core.dom.ast.IASTPreprocessorIncludeStatement;
+import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclaration;
 import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
 import org.eclipse.cdt.core.dom.ast.IBinding;
 import org.eclipse.cdt.core.dom.ast.IParameter;
@@ -407,14 +410,25 @@ class OpenDeclarationsJob extends Job implements ASTRunnable {
 
 	private static boolean isInSameFunction(IASTName refName, IName funcDeclName) {
 		if (funcDeclName instanceof IASTName) {
-			IASTDeclaration fdef = getEnclosingFunctionDefinition((IASTNode) funcDeclName);
-			return fdef != null && fdef.contains(refName);
+			IASTDeclaration fdecl = getEnclosingFunctionDeclaration((IASTNode) funcDeclName);
+			return fdecl != null && fdecl.contains(refName);
 		} 
 		return false;
 	}
 
-	private static IASTDeclaration getEnclosingFunctionDefinition(IASTNode node) {
-		while (node != null && !(node instanceof IASTFunctionDefinition)) {
+	private static boolean isFunctionDeclaration(IASTNode node) {
+		if (node instanceof IASTFunctionDefinition) {
+			return true;
+		}
+		if (node instanceof IASTSimpleDeclaration) {
+			IASTDeclarator[] declarators = ((IASTSimpleDeclaration) node).getDeclarators();
+			return declarators.length == 1 && declarators[0] instanceof IASTFunctionDeclarator;
+		}
+		return false;
+	}
+	
+	private static IASTDeclaration getEnclosingFunctionDeclaration(IASTNode node) {
+		while (node != null && !isFunctionDeclaration(node)) {
 			node= node.getParent();
 		}
 		return (IASTDeclaration) node;