diff --git a/module/sock/posix/posix.c b/module/sock/posix/posix.c
index af064f57f..c8458db10 100644
--- a/module/sock/posix/posix.c
+++ b/module/sock/posix/posix.c
@@ -273,13 +273,13 @@ posix_sock_alloc_pipe(struct spdk_posix_sock *sock, int sz)
 	}
 
 	/* Round up to next 64 byte multiple */
-	new_buf = calloc(SPDK_ALIGN_CEIL(sz + 1, 64), sizeof(uint8_t));
+	new_buf = calloc(SPDK_ALIGN_CEIL(sz, 64), sizeof(uint8_t));
 	if (!new_buf) {
 		SPDK_ERRLOG("socket recv buf allocation failed\n");
 		return -ENOMEM;
 	}
 
-	new_pipe = spdk_pipe_create(new_buf, sz + 1);
+	new_pipe = spdk_pipe_create(new_buf, sz);
 	if (new_pipe == NULL) {
 		SPDK_ERRLOG("socket pipe allocation failed\n");
 		free(new_buf);