diff --git a/src/mesa/main/program_resource.c b/src/mesa/main/program_resource.c
index 6ddbdad997f..5726ce10a16 100644
--- a/src/mesa/main/program_resource.c
+++ b/src/mesa/main/program_resource.c
@@ -104,7 +104,7 @@ stage_from_program_interface(GLenum programInterface)
    case GL_COMPUTE_SUBROUTINE_UNIFORM:
       return MESA_SHADER_COMPUTE;
    default:
-      assert(!"unexpected programInterface value");
+      unreachable("unexpected programInterface value");
    }
 }