diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 7aa32372f08c178b762dd82098156ee1f122c7ed..8d99673573545a3b7f5d2f10616fdcf0d0fd8343 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -70,7 +70,7 @@ static enum dso_binary_type binary_type_symtab[] = {
 
 #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
 
-bool symbol_type__is_a(char symbol_type, enum map_type map_type)
+static bool symbol_type__is_a(char symbol_type, enum map_type map_type)
 {
 	symbol_type = toupper(symbol_type);
 
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 0e95d9478783d8e1fe76cc04553767cce1d57c89..924f465307b1fe0161fb8ddaeea8d680ebaceb72 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -300,7 +300,6 @@ size_t __symbol__fprintf_symname(const struct symbol *sym,
 				 bool unknown_as_addr, FILE *fp);
 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
 size_t symbol__fprintf(struct symbol *sym, FILE *fp);
-bool symbol_type__is_a(char symbol_type, enum map_type map_type);
 bool symbol__restricted_filename(const char *filename,
 				 const char *restricted_filename);
 int symbol__config_symfs(const struct option *opt __maybe_unused,