diff --git a/Mk/bsd.wx.mk b/Mk/bsd.wx.mk
index 35d9e2904038..619d32dfddba 100644
--- a/Mk/bsd.wx.mk
+++ b/Mk/bsd.wx.mk
@@ -307,7 +307,7 @@ HAVE_WX:=				${_HAVE_WX}
 # Used for autodetection of installed versions.
 
 .if defined(_WX_Need_Version)
-_WX_VER_INSTALLED:=		${_HAVE_WX}
+_WX_VER_INSTALLED:=		${_HAVE_WX:Mwx-*:S/wx-//}
 .endif
 
 #