diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 15d6863..8ee0630 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -112,7 +112,7 @@
     {SIGSEGV, 0, "Segmentation fault", }
 };
 static const unsigned char faulthandler_nsignals = \
-    sizeof(faulthandler_handlers) / sizeof(faulthandler_handlers[0]);
+    Py_ARRAY_LENGTH(faulthandler_handlers);
 
 #ifdef HAVE_SIGALTSTACK
 static stack_t stack;