diff --git a/src/compiler/glsl/link_uniforms.cpp b/src/compiler/glsl/link_uniforms.cpp
index 6518ec10f34..f0e229526f6 100644
--- a/src/compiler/glsl/link_uniforms.cpp
+++ b/src/compiler/glsl/link_uniforms.cpp
@@ -1039,7 +1039,7 @@ private:
       assert(!type->without_array()->is_interface());
       assert(!(type->is_array() && type->fields.array->is_array()));
 
-      unsigned id;
+      unsigned id = 0;
       bool found = this->map->get(id, name);
       assert(found);