diff --git a/cfg/opengl.cfg b/cfg/opengl.cfg
index bd90cf316..1c633c92a 100644
--- a/cfg/opengl.cfg
+++ b/cfg/opengl.cfg
@@ -182,6 +182,32 @@
       <not-bool/>
     </arg>
   </function>
+  <!-- https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glGetString.xhtml -->
+  <!-- const GLubyte *glGetString( GLenum name); -->
+  <function name="glGetString">
+    <noreturn>false</noreturn>
+    <returnValue type="const GLubyte *"/>
+    <use-retval/>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
+  <!-- const GLubyte *glGetStringi( GLenum name, GLuint index); -->
+  <function name="glGetStringi">
+    <noreturn>false</noreturn>
+    <returnValue type="const GLubyte *"/>
+    <use-retval/>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
   <!-- https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glIsEnabled.xml -->
   <!-- GLboolean glIsEnabled( GLenum cap ); -->
   <function name="glIsEnabled">