diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index a245a11046a..9dbb92698c1 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -82,8 +82,6 @@
 #include "main/enums.h"
 
 
-void linker_error(gl_shader_program *, const char *, ...);
-
 namespace {
 
 /**