diff --git a/icu4j/main/classes/collate/src/com/ibm/icu/text/CollationRuleParser.java b/icu4j/main/classes/collate/src/com/ibm/icu/text/CollationRuleParser.java
index 881ed44b74a..4ea00c434e4 100644
--- a/icu4j/main/classes/collate/src/com/ibm/icu/text/CollationRuleParser.java
+++ b/icu4j/main/classes/collate/src/com/ibm/icu/text/CollationRuleParser.java
@@ -1322,6 +1322,7 @@ final class CollationRuleParser
      * @return the offset of the next unparsed char
      * @throws ParseException
      */
+    @SuppressWarnings("fallthrough")
     private int parseNextTokenInternal(boolean startofrules) throws ParseException {
         boolean variabletop = false;
         boolean top = false;