diff --git a/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java b/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java
index e78efb6f59..8fc01fec00 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/RuntimeMetaData.java
@@ -157,11 +157,11 @@ public static void checkVersion(String generatingToolVersion, String compileTime
 			!getMajorMinorVersion(runtimeVersion).equals(getMajorMinorVersion(compileTimeVersion));
 
 		if ( runtimeConflictsWithGeneratingTool ) {
-			System.err.printf("ANTLR Tool version %s used for code generation does not match the current runtime version %s%n",
+			System.out.printf("ANTLR Tool version %s used for code generation does not match the current runtime version %s%n",
 							  generatingToolVersion, runtimeVersion);
 		}
 		if ( runtimeConflictsWithCompileTimeTool ) {
-			System.err.printf("ANTLR Runtime version %s used for parser compilation does not match the current runtime version %s%n",
+			System.out.printf("ANTLR Runtime version %s used for parser compilation does not match the current runtime version %s%n",
 							  compileTimeVersion, runtimeVersion);
 		}
 	}