diff --git a/cfg/gtk.cfg b/cfg/gtk.cfg
index 360dd7615..494e792ec 100644
--- a/cfg/gtk.cfg
+++ b/cfg/gtk.cfg
@@ -4087,12 +4087,10 @@
     <returnValue type="int"/>
     <use-retval/>
     <arg nr="1" direction="in">
-      <not-null/>
       <not-uninit/>
       <strz/>
     </arg>
     <arg nr="2" direction="in">
-      <not-null/>
       <not-uninit/>
       <strz/>
       <not-bool/>
@@ -20432,7 +20430,6 @@
     <returnValue type="gchar *"/>
     <use-retval/>
     <arg nr="1">
-      <not-null/>
       <not-uninit/>
       <not-bool/>
     </arg>