diff --git a/Common/3dParty/hunspell/test/test.pro b/Common/3dParty/hunspell/test/test.pro
index 2bf6cfb02a..28b36d0dec 100644
--- a/Common/3dParty/hunspell/test/test.pro
+++ b/Common/3dParty/hunspell/test/test.pro
@@ -27,14 +27,17 @@ include($$CORE_ROOT_DIR/Common/3dParty/hunspell/qt/hunspell.pri)
 # also increase, so it is good to increase the global limit. this works the same for the candidate limit with suggest limit
 DEFINES += CUSTOM_TIMELIMITS
 
+escape_bracket=
+!core_windows:escape_bracket=\\
+
 # total time limit per word for all cases. (default is CLOCKS_PER_SEC/4)
-DEFINES += "CUSTOM_TIMELIMIT_GLOBAL=\\\(20*CLOCKS_PER_SEC\\\)"
+DEFINES += "CUSTOM_TIMELIMIT_GLOBAL=$${escape_bracket}(20*CLOCKS_PER_SEC$${escape_bracket})"
 
 # total time limit per "1 case" - forgotten char, double char, moved char and so on for all candidates. (default is CLOCKS_PER_SEC/10)
-DEFINES += "CUSTOM_TIMELIMIT_SUGGESTION=\\\(5*CLOCKS_PER_SEC\\\)"
+DEFINES += "CUSTOM_TIMELIMIT_SUGGESTION=$${escape_bracket}(5*CLOCKS_PER_SEC$${escape_bracket})"
 
 # time limit per candidate (default is CLOCKS_PER_SEC/20)
-DEFINES += "CUSTOM_TIMELIMIT=\\\(CLOCKS_PER_SEC\\\)"
+DEFINES += "CUSTOM_TIMELIMIT=$${escape_bracket}(CLOCKS_PER_SEC$${escape_bracket}\)"
 
 ADD_DEPENDENCY(UnicodeConverter kernel)