1 files changed, 2 insertions, 1 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 17dd0a9c96..e00eb0f4e2 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3781,7 +3781,8 @@ public_mEMALIGn(size_t alignment, size_t bytes)
       }
 #endif
     }
-  }
+  } else
+    (void)mutex_unlock(&ar_ptr->mutex);
   assert(!p || chunk_is_mmapped(mem2chunk(p)) ||
 	 ar_ptr == arena_for_chunk(mem2chunk(p)));
   return p;