diff --git a/utils.c b/utils.c
index 6d4c36c..82af887 100644
--- a/utils.c
+++ b/utils.c
@@ -38,28 +38,14 @@ void *__calloc_a(size_t len, ...)
 	void *ret;
 	void **cur_addr;
 	size_t cur_len;
-	size_t alloc_len = 0;
+	int alloc_len = 0;
 	char *ptr;
 
 	va_start(ap, len);
 
 	va_copy(ap1, ap);
-	foreach_arg(ap1, cur_addr, cur_len, &ret, len) {
-		size_t aligned;
-
-		if (cur_len > SIZE_MAX - (C_PTR_ALIGN - 1)) {
-			va_end(ap1);
-			va_end(ap);
-			return NULL;
-		}
-		aligned = (cur_len + C_PTR_ALIGN - 1) & C_PTR_MASK;
-		if (aligned > SIZE_MAX - alloc_len) {
-			va_end(ap1);
-			va_end(ap);
-			return NULL;
-		}
-		alloc_len += aligned;
-	}
+	foreach_arg(ap1, cur_addr, cur_len, &ret, len)
+		alloc_len += (cur_len + C_PTR_ALIGN - 1 ) & C_PTR_MASK;
 	va_end(ap1);
 
 	ptr = calloc(1, alloc_len);