diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/asm/AsmCodeScanner.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/asm/AsmCodeScanner.java
index 23738f42cdd..32c40357b54 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/asm/AsmCodeScanner.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/editor/asm/AsmCodeScanner.java
@@ -95,6 +95,7 @@ public final class AsmCodeScanner extends AbstractCScanner {
 		WordRule wordRule= new WordRule(new AsmWordDetector('.'), other);
 		for (int i=0; i<keywords.length; i++)
 			wordRule.addWord(keywords[i], token);
+		rules.add(wordRule);
 
 		// TODO use extra color?
 		token= getToken(ICColorConstants.C_KEYWORD);