diff --git a/src/common/cmdline.cpp b/src/common/cmdline.cpp
index 030f891ea6..d32958fb93 100644
--- a/src/common/cmdline.cpp
+++ b/src/common/cmdline.cpp
@@ -1171,7 +1171,6 @@ wxString wxCmdLineParser::GetUsageString() const
                 option << (!opt.longName ? wxT(':') : wxT('=')) << val;
             }
 
-            usage << negator;
             if ( !(opt.flags & wxCMD_LINE_OPTION_MANDATORY) )
             {
                 usage << wxT(']');