diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompleteParseProblemTest.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompleteParseProblemTest.java
index 1e404a79aaa..0d34cb19864 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompleteParseProblemTest.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompleteParseProblemTest.java
@@ -75,4 +75,20 @@ public class CompleteParseProblemTest extends CompleteParseBaseTest {
 
 	}
 
+	public void testBug68931() throws Exception
+	{
+	    String code = "void foo(){ SomeUnknownType t; } "; //$NON-NLS-1$
+	    parse( code, false );
+	    
+	    int start = code.indexOf( "SomeUnknownType" ); //$NON-NLS-1$
+	    int end = start + 15;
+	    
+	    assertFalse( callback.problems.isEmpty() );
+	    assertEquals( callback.problems.size(), 1 );
+		IProblem p = (IProblem) callback.problems.get( 0 );
+		assertTrue( p.checkCategory( IProblem.SEMANTICS_RELATED ));
+		assertEquals( p.getSourceStart(), start );
+		assertEquals( p.getSourceEnd(), end );
+		assertEquals( p.getID(), IProblem.SEMANTIC_NAME_NOT_FOUND );   
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/Parser.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/Parser.java
index 9ba4f464527..3047d8b21cd 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/Parser.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/Parser.java
@@ -1126,7 +1126,10 @@ public abstract class Parser extends ExpressionParser implements IParser
             {
             	int endOffset = ( lastToken != null ) ? lastToken.getEndOffset() : 0 ;
             	logException( "simpleDeclaration:createSimpleTypeSpecifier", e1 ); //$NON-NLS-1$
-                throwBacktrack(firstOffset, endOffset, firstLine);
+            	if( e1 instanceof ASTSemanticException && ((ASTSemanticException)e1).getProblem() != null )
+            	    throwBacktrack(((ASTSemanticException)e1).getProblem());
+            	else
+            	    throwBacktrack(firstOffset, endOffset, firstLine);
             }
         
         try {
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java
index 53156413f91..9b219867b2a 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java
@@ -2042,7 +2042,7 @@ public class CompleteParseASTFactory extends BaseASTFactory implements IASTFacto
                     	}
 					}
 					else
-                    	handleProblem( IProblem.SEMANTIC_NAME_NOT_FOUND, image, -1, -1, current.getLineNumber(), true );
+                    	handleProblem( IProblem.SEMANTIC_NAME_NOT_FOUND, image, current.getOffset(), current.getEndOffset(), current.getLineNumber(), true );
                 }
                 catch (ParserSymbolTableException e)
                 {