diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 3365c47..fc2c8f0 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -172,8 +172,10 @@
 static void
 show_alloc(void)
 {
-	fprintf(stderr, "Dict allocations: %zd\n", count_alloc);
-	fprintf(stderr, "Dict reuse through freelist: %zd\n", count_reuse);
+	fprintf(stderr, "Dict allocations: %" PY_FORMAT_SIZE_T "d\n",
+		count_alloc);
+	fprintf(stderr, "Dict reuse through freelist: %" PY_FORMAT_SIZE_T
+		"d\n", count_reuse);
 	fprintf(stderr, "%.2f%% reuse rate\n\n",
 		(100.0*count_reuse/(count_alloc+count_reuse)));
 }
diff --git a/Objects/listobject.c b/Objects/listobject.c
index d2917d2..eec1c22 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -72,8 +72,10 @@
 static void
 show_alloc(void)
 {
-	fprintf(stderr, "List allocations: %zd\n", count_alloc);
-	fprintf(stderr, "List reuse through freelist: %zd\n", count_reuse);
+	fprintf(stderr, "List allocations: %" PY_FORMAT_SIZE_T "d\n",
+		count_alloc);
+	fprintf(stderr, "List reuse through freelist: %" PY_FORMAT_SIZE_T
+		"d\n", count_reuse);
 	fprintf(stderr, "%.2f%% reuse rate\n\n",
 		(100.0*count_reuse/(count_alloc+count_reuse)));
 }