diff --git a/src/_imaging.c b/src/_imaging.c
index 15520040f..f1071b1ce 100644
--- a/src/_imaging.c
+++ b/src/_imaging.c
@@ -4093,8 +4093,8 @@ _set_blocks_max(PyObject *self, PyObject *args) {
         return NULL;
     }
 
-    if ((unsigned long)blocks_max > SIZE_MAX /
-            sizeof(ImagingDefaultArena.blocks_pool[0])) {
+    if ((unsigned long)blocks_max >
+        SIZE_MAX / sizeof(ImagingDefaultArena.blocks_pool[0])) {
         PyErr_SetString(PyExc_ValueError, "blocks_max is too large");
         return NULL;
     }