diff --git a/layout/generic/nsBulletFrame.cpp b/layout/generic/nsBulletFrame.cpp
index f56e2c7c90dd..a858a37240f8 100644
--- a/layout/generic/nsBulletFrame.cpp
+++ b/layout/generic/nsBulletFrame.cpp
@@ -467,15 +467,20 @@ static PRBool RomanToText(PRInt32 ordinal, nsString& result, const char* achars,
     romanPos--;
     addOn.SetLength(0);
     switch(*dp) {
-      case '3':  addOn.Append(PRUnichar(achars[romanPos]));
-      case '2':  addOn.Append(PRUnichar(achars[romanPos]));
-      case '1':  addOn.Append(PRUnichar(achars[romanPos]));
+      case '3':
+        addOn.Append(PRUnichar(achars[romanPos]));
+        // FALLTHROUGH
+      case '2':
+        addOn.Append(PRUnichar(achars[romanPos]));
+        // FALLTHROUGH
+      case '1':
+        addOn.Append(PRUnichar(achars[romanPos]));
         break;
       case '4':
         addOn.Append(PRUnichar(achars[romanPos]));
         // FALLTHROUGH
       case '5': case '6':
-      case '7': case  '8':
+      case '7': case '8':
         addOn.Append(PRUnichar(bchars[romanPos]));
         for(n=0;'5'+n<*dp;n++) {
           addOn.Append(PRUnichar(achars[romanPos]));