diff --git a/pcbnew/import_gfx/dxf_import_plugin.h b/pcbnew/import_gfx/dxf_import_plugin.h
index fb7b1541c8..e774ed2c8b 100644
--- a/pcbnew/import_gfx/dxf_import_plugin.h
+++ b/pcbnew/import_gfx/dxf_import_plugin.h
@@ -148,7 +148,8 @@ public:
 
     const wxArrayString GetFileExtensions() const override
     {
-        return wxArrayString( 1, formatWildcardExt( "dxf" ) );
+        static wxString wildcardExt = formatWildcardExt( "dxf" );
+        return wxArrayString( 1, &wildcardExt );
     }
 
     bool Load( const wxString& aFileName ) override;
diff --git a/pcbnew/import_gfx/svg_import_plugin.h b/pcbnew/import_gfx/svg_import_plugin.h
index bbd441cdc6..78e49b8b35 100644
--- a/pcbnew/import_gfx/svg_import_plugin.h
+++ b/pcbnew/import_gfx/svg_import_plugin.h
@@ -45,8 +45,8 @@ public:
 
     const wxArrayString GetFileExtensions() const override
     {
-
-        return wxArrayString( 1, formatWildcardExt( "svg" ) );
+        static wxString wildcardExt = formatWildcardExt( "svg" );
+        return wxArrayString( 1, &wildcardExt );
     }
 
     /**