diff --git a/include/stdint.h b/include/stdint.h
index 14ebcdacc2..74c5959564 100644
--- a/include/stdint.h
+++ b/include/stdint.h
@@ -367,8 +367,12 @@ typedef __UINTMAX_TYPE__ uintmax_t;
 #undef WINT_WIDTH
 #define WINT_WIDTH __WINT_WIDTH__
 
+#ifdef __ILP32__
+#define SIZE_MAX UINT32_MAX
+#else
 #define SIZE_MAX UINT64_MAX
 #endif
+#endif
 
 typedef long sig_atomic_t;