diff --git a/runtime/Java/src/org/antlr/v4/runtime/atn/SemanticContext.java b/runtime/Java/src/org/antlr/v4/runtime/atn/SemanticContext.java
index 85a9e997b..167d1878b 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/atn/SemanticContext.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/atn/SemanticContext.java
@@ -125,7 +125,7 @@ public abstract class SemanticContext {
         }
 
 		@Override
-		public boolean equals(@NotNull Object obj) {
+		public boolean equals(Object obj) {
 			if ( this==obj ) return true;
 			if ( !(obj instanceof AND) ) return false;
 			AND other = (AND)obj;
@@ -162,7 +162,7 @@ public abstract class SemanticContext {
         }
 
 		@Override
-		public boolean equals(@NotNull Object obj) {
+		public boolean equals(Object obj) {
 			if ( this==obj ) return true;
 			if ( !(obj instanceof OR) ) return false;
 			OR other = (OR)obj;