diff --git a/dlls/dbghelp/symbol.c b/dlls/dbghelp/symbol.c
index c9585c5e714..96a1f8743c4 100644
--- a/dlls/dbghelp/symbol.c
+++ b/dlls/dbghelp/symbol.c
@@ -851,7 +851,7 @@ static void symt_get_length(struct module* module, const struct symt* symt, ULON
 }
 
 /* neede by symt_find_nearest */
-int symt_get_best_at(struct module* module, int idx_sorttab)
+static int symt_get_best_at(struct module* module, int idx_sorttab)
 {
     ULONG64 ref_addr;
     int idx_sorttab_orig = idx_sorttab;