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-rw-r--r--libc/stdlib/malloc/heap.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libc/stdlib/malloc/heap.h b/libc/stdlib/malloc/heap.h
index ab1a73896..b66b5ecef 100644
--- a/libc/stdlib/malloc/heap.h
+++ b/libc/stdlib/malloc/heap.h
@@ -25,7 +25,7 @@
HEAP_GRANULARITY must be a power of 2. Malloc depends on this being the
same as MALLOC_ALIGNMENT. */
#define HEAP_GRANULARITY_TYPE double
-#define HEAP_GRANULARITY (sizeof (HEAP_GRANULARITY_TYPE))
+#define HEAP_GRANULARITY (__alignof__ (HEAP_GRANULARITY_TYPE))
/* A heap is a collection of memory blocks, from which smaller blocks