diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index 897386333ce..de868e45fc2 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -12972,6 +12972,10 @@
     <function name="DrawElementsInstancedBaseVertexBaseInstanceDrawID"
               es1="1.0" es2="2.0" marshal="custom">
     </function>
+
+    <!-- Internal function for glthread to implement ancillary buffer invalidation. -->
+    <function name="InternalInvalidateFramebufferAncillaryMESA" es2="3.0">
+    </function>
 </category>
 
 <xi:include href="OES_EGL_image.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
diff --git a/src/mapi/glapi/gen/static_data.py b/src/mapi/glapi/gen/static_data.py
index a98f901bcc8..b4c85358c9d 100644
--- a/src/mapi/glapi/gen/static_data.py
+++ b/src/mapi/glapi/gen/static_data.py
@@ -1703,6 +1703,7 @@ offsets = {
     "MultiDrawElementsUserBuf": 1667,
     "DrawArraysInstancedBaseInstanceDrawID": 1668,
     "DrawElementsInstancedBaseVertexBaseInstanceDrawID": 1669,
+    "InternalInvalidateFramebufferAncillaryMESA": 1670,
 }
 
 functions = [
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index e011453a21d..42cbc20bbb5 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -5524,6 +5524,15 @@ _mesa_InvalidateFramebuffer(GLenum target, GLsizei numAttachments,
    discard_framebuffer(ctx, fb, numAttachments, attachments);
 }
 
+void GLAPIENTRY
+_mesa_InternalInvalidateFramebufferAncillaryMESA(void)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_framebuffer *fb = get_framebuffer_target(ctx, GL_FRAMEBUFFER);
+   discard_attachments(ctx, fb, BITFIELD_BIT(BUFFER_DEPTH) | BITFIELD_BIT(BUFFER_STENCIL));
+}
+
 
 void GLAPIENTRY
 _mesa_InvalidateNamedFramebufferData(GLuint framebuffer,
diff --git a/src/mesa/main/fbobject.h b/src/mesa/main/fbobject.h
index bcc4e08eb69..7dedf1006ea 100644
--- a/src/mesa/main/fbobject.h
+++ b/src/mesa/main/fbobject.h
@@ -133,4 +133,7 @@ _mesa_bind_framebuffers(struct gl_context *ctx,
                         struct gl_framebuffer *newDrawFb,
                         struct gl_framebuffer *newReadFb);
 
+void GLAPIENTRY
+_mesa_InternalInvalidateFramebufferAncillaryMESA(void);
+
 #endif /* FBOBJECT_H */