diff --git a/libfio.c b/libfio.c
index 7eff63b..523cc36 100644
--- a/libfio.c
+++ b/libfio.c
@@ -302,8 +302,12 @@
 	 * can run into problems on archs that fault on unaligned fp
 	 * access (ARM).
 	 */
-	compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "fp align");
-	compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "fp align");
+	compiletime_assert((offsetof(struct thread_stat, percentile_list) % 8) == 0, "stat percentile_list");
+	compiletime_assert((offsetof(struct thread_stat, latency_percentile) % 8) == 0, "stat latency_percentile");
+	compiletime_assert((offsetof(struct thread_options_pack, zipf_theta) % 8) == 0, "zipf_theta");
+	compiletime_assert((offsetof(struct thread_options_pack, pareto_h) % 8) == 0, "pareto_h");
+	compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "percentile_list");
+	compiletime_assert((offsetof(struct thread_options_pack, percentile_list) % 8) == 0, "latency_percentile");
 
 	if (endian_check()) {
 		log_err("fio: endianness settings appear wrong.\n");
diff --git a/server.h b/server.h
index 67ba38d..46d05a6 100644
--- a/server.h
+++ b/server.h
@@ -38,7 +38,7 @@
 };
 
 enum {
-	FIO_SERVER_VER			= 37,
+	FIO_SERVER_VER			= 38,
 
 	FIO_SERVER_MAX_FRAGMENT_PDU	= 1024,
 	FIO_SERVER_MAX_CMD_MB		= 2048,
diff --git a/thread_options.h b/thread_options.h
index a45d7b7..5c9910a 100644
--- a/thread_options.h
+++ b/thread_options.h
@@ -349,6 +349,7 @@
 	uint32_t bs_is_seq_rand;
 
 	uint32_t random_distribution;
+	uint32_t pad;
 	fio_fp64_t zipf_theta;
 	fio_fp64_t pareto_h;