diff --git a/ast_to_hir.cpp b/ast_to_hir.cpp
index a41bae68933..2d7c92625e3 100644
--- a/ast_to_hir.cpp
+++ b/ast_to_hir.cpp
@@ -717,7 +717,7 @@ ast_expression::hir(exec_list *instructions,
    }
    }
 
-   if (is_error_type(type) && !error_emitted)
+   if (type->is_error() && !error_emitted)
       _mesa_glsl_error(& loc, state, "type mismatch");
 
    return result;
diff --git a/glsl_types.h b/glsl_types.h
index 64c6cef669e..beaaa78f553 100644
--- a/glsl_types.h
+++ b/glsl_types.h
@@ -39,8 +39,6 @@
 #define GLSL_TYPE_VOID          8
 #define GLSL_TYPE_ERROR         9
 
-#define is_error_type(t) ((t)->base_type == GLSL_TYPE_ERROR)
-
 enum glsl_sampler_dim {
    GLSL_SAMPLER_DIM_1D = 0,
    GLSL_SAMPLER_DIM_2D,