diff --git a/tool/src/org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java b/tool/src/org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java
index 3304f77bd..98a1a824b 100644
--- a/tool/src/org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java
+++ b/tool/src/org/antlr/v4/analysis/LeftRecursiveRuleAnalyzer.java
@@ -137,7 +137,7 @@ public class LeftRecursiveRuleAnalyzer extends LeftRecursiveRuleWalker {
 		}
 
 		if ( altAssociativity.get(alt)!=null && altAssociativity.get(alt)!=assoc ) {
-			tool.errMgr.toolError(ErrorType.ALL_OPS_NEED_SAME_ASSOC, alt);
+			tool.errMgr.toolError(ErrorType.INTERNAL_ERROR, "all operators of alt " + alt + " of left-recursive rule must have same associativity");
 		}
 		altAssociativity.put(alt, assoc);
 
diff --git a/tool/src/org/antlr/v4/tool/ErrorType.java b/tool/src/org/antlr/v4/tool/ErrorType.java
index 0c79a25d7..c67c6fd17 100644
--- a/tool/src/org/antlr/v4/tool/ErrorType.java
+++ b/tool/src/org/antlr/v4/tool/ErrorType.java
@@ -429,6 +429,8 @@ public enum ErrorType {
 	 * <p>
 	 * all operators of alt <em>alt</em> of left-recursive rule must have same
 	 * associativity</p>
+	 *
+	 * @deprecated This warning is no longer applicable with the current syntax for specifying associativity.
 	 */
 	ALL_OPS_NEED_SAME_ASSOC(118, "all operators of alt <arg> of left-recursive rule must have same associativity", ErrorSeverity.WARNING),
 	/**