diff --git a/dlls/d3dcompiler_43/d3dcompiler_private.h b/dlls/d3dcompiler_43/d3dcompiler_private.h
index 9f7fce12a4c..5e5f1d3eb38 100644
--- a/dlls/d3dcompiler_43/d3dcompiler_private.h
+++ b/dlls/d3dcompiler_43/d3dcompiler_private.h
@@ -834,7 +834,6 @@ BOOL pop_scope(struct hlsl_parse_ctx *ctx) DECLSPEC_HIDDEN;
 struct bwriter_shader *parse_hlsl_shader(const char *text, enum shader_type type, DWORD version,
         const char *entrypoint, char **messages) DECLSPEC_HIDDEN;
 
-const char *debug_base_type(const struct hlsl_type *type) DECLSPEC_HIDDEN;
 const char *debug_hlsl_type(const struct hlsl_type *type) DECLSPEC_HIDDEN;
 const char *debug_modifiers(DWORD modifiers) DECLSPEC_HIDDEN;
 void free_hlsl_type(struct hlsl_type *type) DECLSPEC_HIDDEN;
diff --git a/dlls/d3dcompiler_43/utils.c b/dlls/d3dcompiler_43/utils.c
index c890fd8d091..304f70c5905 100644
--- a/dlls/d3dcompiler_43/utils.c
+++ b/dlls/d3dcompiler_43/utils.c
@@ -886,7 +886,7 @@ BOOL pop_scope(struct hlsl_parse_ctx *ctx)
     return TRUE;
 }
 
-const char *debug_base_type(const struct hlsl_type *type)
+static const char *debug_base_type(const struct hlsl_type *type)
 {
     const char *name = "(unknown)";
 
@@ -961,7 +961,7 @@ const char *debug_modifiers(DWORD modifiers)
     return wine_dbg_sprintf("%s", string[0] ? string + 1 : "");
 }
 
-const char *debug_node_type(enum hlsl_ir_node_type type)
+static const char *debug_node_type(enum hlsl_ir_node_type type)
 {
     const char *names[] =
     {