diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index cca03831..f0b863e 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -406,7 +406,7 @@
 	return he;
 }
 
-struct hist_entry *__hists__add_mem_entry(struct hists *self,
+struct hist_entry *__hists__add_mem_entry(struct hists *hists,
 					  struct addr_location *al,
 					  struct symbol *sym_parent,
 					  struct mem_info *mi,
@@ -429,14 +429,14 @@
 		.level	= al->level,
 		.parent = sym_parent,
 		.filtered = symbol__parent_filter(sym_parent),
-		.hists = self,
+		.hists = hists,
 		.mem_info = mi,
 		.branch_info = NULL,
 	};
-	return add_hist_entry(self, &entry, al, period, weight);
+	return add_hist_entry(hists, &entry, al, period, weight);
 }
 
-struct hist_entry *__hists__add_branch_entry(struct hists *self,
+struct hist_entry *__hists__add_branch_entry(struct hists *hists,
 					     struct addr_location *al,
 					     struct symbol *sym_parent,
 					     struct branch_info *bi,
@@ -460,14 +460,14 @@
 		.parent = sym_parent,
 		.filtered = symbol__parent_filter(sym_parent),
 		.branch_info = bi,
-		.hists	= self,
+		.hists	= hists,
 		.mem_info = NULL,
 	};
 
-	return add_hist_entry(self, &entry, al, period, weight);
+	return add_hist_entry(hists, &entry, al, period, weight);
 }
 
-struct hist_entry *__hists__add_entry(struct hists *self,
+struct hist_entry *__hists__add_entry(struct hists *hists,
 				      struct addr_location *al,
 				      struct symbol *sym_parent, u64 period,
 				      u64 weight, u64 transaction)
@@ -488,13 +488,13 @@
 		},
 		.parent = sym_parent,
 		.filtered = symbol__parent_filter(sym_parent),
-		.hists	= self,
+		.hists	= hists,
 		.branch_info = NULL,
 		.mem_info = NULL,
 		.transaction = transaction,
 	};
 
-	return add_hist_entry(self, &entry, al, period, weight);
+	return add_hist_entry(hists, &entry, al, period, weight);
 }
 
 int64_t