diff --git a/protobuf3/Protobuf3.g4 b/protobuf3/Protobuf3.g4
index bb7302d125..ff2d20a0de 100644
--- a/protobuf3/Protobuf3.g4
+++ b/protobuf3/Protobuf3.g4
@@ -462,7 +462,7 @@ PROTO3_LIT_SINGLE
     : '"proto3"'
     ;
 
-PROTO3_LIT_DOBULE
+PROTO3_LIT_DOUBLE
     : '\'proto3\''
     ;
 
@@ -659,4 +659,4 @@ keywords
     | STREAM
     | RETURNS
     | BOOL_LIT
-    ;
\ No newline at end of file
+    ;