diff --git a/ltk/org.eclipse.statet.ltk.core/src/org/eclipse/statet/ltk/ast/core/util/AbstractAstProblemReporter.java b/ltk/org.eclipse.statet.ltk.core/src/org/eclipse/statet/ltk/ast/core/util/AbstractAstProblemReporter.java
index a68844d..adb6b20 100644
--- a/ltk/org.eclipse.statet.ltk.core/src/org/eclipse/statet/ltk/ast/core/util/AbstractAstProblemReporter.java
+++ b/ltk/org.eclipse.statet.ltk.core/src/org/eclipse/statet/ltk/ast/core/util/AbstractAstProblemReporter.java
@@ -152,7 +152,7 @@
 		final StringBuilder sb= new StringBuilder();
 		sb.append("Unhandled/Unknown code of AST node (").append(this.modelTypeId).append("):"); //$NON-NLS-1$ //$NON-NLS-2$
 		sb.append('\n');
-		sb.append("  code= 0x").append(Integer.toHexString(code)); //$NON-NLS-1$
+		sb.append("  code= ").append(String.format("0x%1$08X", code)); //$NON-NLS-1$
 		sb.append('\n');
 		sb.append("  node= ").append(node);
 		sb.append(" (").append(node.getStartOffset()).append(", ").append(node.getLength()).append(')'); //$NON-NLS-1$ //$NON-NLS-2$