diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index 92db2fccc788..109a166a6d19 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -171,7 +171,6 @@ int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
 	}
 
 	return ret;
-
 }
 
 /**
@@ -620,7 +619,7 @@ Dwarf_Die *die_find_tailfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
 	ad.addr = addr;
 	ad.die_mem = die_mem;
 	/* dwarf_getscopes can't find subprogram. */
-	if (!dwarf_getfuncs(cu_die, __die_search_func_tail_cb, &ad, 0))
+	if (dwarf_getfuncs(cu_die, __die_search_func_tail_cb, &ad, 0) <= 0)
 		return NULL;
 	else
 		return die_mem;
@@ -659,7 +658,7 @@ Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
 	ad.addr = addr;
 	ad.die_mem = die_mem;
 	/* dwarf_getscopes can't find subprogram. */
-	if (!dwarf_getfuncs(cu_die, __die_search_func_cb, &ad, 0))
+	if (dwarf_getfuncs(cu_die, __die_search_func_cb, &ad, 0) <= 0)
 		return NULL;
 	else
 		return die_mem;