diff --git a/src/common/cmdline.cpp b/src/common/cmdline.cpp
index 97e3229637..a9020f17d1 100644
--- a/src/common/cmdline.cpp
+++ b/src/common/cmdline.cpp
@@ -672,6 +672,7 @@ int wxCmdLineParser::Parse(bool showUsage)
     Reset();
 
     // parse everything
+    m_data->m_parameters.clear();
     wxString arg;
     size_t count = m_data->m_arguments.size();
     for ( size_t n = 1; ok && (n < count); n++ )    // 0 is program name