diff --git a/src/mesa/main/APIspec.xml b/src/mesa/main/APIspec.xml
index c3066af5f2d..c0e6bc4e8dc 100644
--- a/src/mesa/main/APIspec.xml
+++ b/src/mesa/main/APIspec.xml
@@ -882,16 +882,6 @@
 		<param name="func" type="GLenum"/>
 		<param name="ref" type="GLtype"/>
 	</proto>
-	<desc name="func">
-		<value name="GL_NEVER"/>
-		<value name="GL_LESS"/>
-		<value name="GL_EQUAL"/>
-		<value name="GL_LEQUAL"/>
-		<value name="GL_GREATER"/>
-		<value name="GL_NOTEQUAL"/>
-		<value name="GL_GEQUAL"/>
-		<value name="GL_ALWAYS"/>
-	</desc>
 </template>
 
 <template name="BlendFunc">
diff --git a/src/mesa/main/es1_conversion.c b/src/mesa/main/es1_conversion.c
index 12cbcd4070f..ff5e45176e2 100644
--- a/src/mesa/main/es1_conversion.c
+++ b/src/mesa/main/es1_conversion.c
@@ -38,22 +38,6 @@
 void GL_APIENTRY
 _es_AlphaFuncx(GLenum func, GLclampx ref)
 {
-   switch(func) {
-   case GL_NEVER:
-   case GL_LESS:
-   case GL_EQUAL:
-   case GL_LEQUAL:
-   case GL_GREATER:
-   case GL_NOTEQUAL:
-   case GL_GEQUAL:
-   case GL_ALWAYS:
-      break;
-   default:
-      _mesa_error(_mesa_get_current_context(), GL_INVALID_ENUM,
-                  "glAlphaFuncx(func=0x%x)", func);
-      return;
-   }
-
    _mesa_AlphaFunc(func, (GLclampf) (ref / 65536.0f));
 }