diff --git a/proc/diskstats.c b/proc/diskstats.c
index a9d2c593..c47dfad7 100644
--- a/proc/diskstats.c
+++ b/proc/diskstats.c
@@ -691,8 +691,7 @@ static int diskstats_stacks_reconfig_maybe (
         memcpy(this->items, items, sizeof(enum diskstats_item) * numitems);
         this->items[numitems] = DISKSTATS_logical_end;
         this->numitems = numitems + 1;
-        if (this->extents)
-            diskstats_extents_free_all(this);
+        diskstats_extents_free_all(this);
         return 1;
     }
     return 0;
diff --git a/proc/slabinfo.c b/proc/slabinfo.c
index 73aa232e..4a6d7ed5 100644
--- a/proc/slabinfo.c
+++ b/proc/slabinfo.c
@@ -716,8 +716,7 @@ static int slabinfo_stacks_reconfig_maybe (
         memcpy(this->items, items, sizeof(enum slabinfo_item) * numitems);
         this->items[numitems] = SLABINFO_logical_end;
         this->numitems = numitems + 1;
-        if (this->extents)
-            slabinfo_extents_free_all(this);
+        slabinfo_extents_free_all(this);
         return 1;
     }
     return 0;