diff --git a/cockatrice/src/game/filters/filter_string.cpp b/cockatrice/src/game/filters/filter_string.cpp
index e69f7508b..b9d75287c 100644
--- a/cockatrice/src/game/filters/filter_string.cpp
+++ b/cockatrice/src/game/filters/filter_string.cpp
@@ -12,7 +12,7 @@ Start <- QueryPartList
 ~ws <- [ ]+
 QueryPartList <- ComplexQueryPart ( ws ("AND" ws)? ComplexQueryPart)* ws*
 
-ComplexQueryPart <- SomewhatComplexQueryPart ws $or<[O][R]> ws ComplexQueryPart / SomewhatComplexQueryPart
+ComplexQueryPart <- SomewhatComplexQueryPart ws "OR" ws ComplexQueryPart / SomewhatComplexQueryPart
 
 SomewhatComplexQueryPart <- [(] QueryPartList [)] / QueryPart