diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
index 7ee844fb..7c5b9d13 100644
--- a/amdgpu/amdgpu_cs.c
+++ b/amdgpu/amdgpu_cs.c
@@ -733,12 +733,13 @@ drm_public int amdgpu_cs_submit_raw(amdgpu_device_handle dev,
 				    struct drm_amdgpu_cs_chunk *chunks,
 				    uint64_t *seq_no)
 {
-	union drm_amdgpu_cs cs = {0};
+	union drm_amdgpu_cs cs;
 	uint64_t *chunk_array;
 	int i, r;
 	if (num_chunks == 0)
 		return -EINVAL;
 
+	memset(&cs, 0, sizeof(cs));
 	chunk_array = alloca(sizeof(uint64_t) * num_chunks);
 	for (i = 0; i < num_chunks; i++)
 		chunk_array[i] = (uint64_t)(uintptr_t)&chunks[i];
@@ -763,10 +764,11 @@ drm_public int amdgpu_cs_submit_raw2(amdgpu_device_handle dev,
 				     struct drm_amdgpu_cs_chunk *chunks,
 				     uint64_t *seq_no)
 {
-	union drm_amdgpu_cs cs = {0};
+	union drm_amdgpu_cs cs;
 	uint64_t *chunk_array;
 	int i, r;
 
+	memset(&cs, 0, sizeof(cs));
 	chunk_array = alloca(sizeof(uint64_t) * num_chunks);
 	for (i = 0; i < num_chunks; i++)
 		chunk_array[i] = (uint64_t)(uintptr_t)&chunks[i];
@@ -803,9 +805,10 @@ drm_public int amdgpu_cs_fence_to_handle(amdgpu_device_handle dev,
 					 uint32_t what,
 					 uint32_t *out_handle)
 {
-	union drm_amdgpu_fence_to_handle fth = {0};
+	union drm_amdgpu_fence_to_handle fth;
 	int r;
 
+	memset(&fth, 0, sizeof(fth));
 	fth.in.fence.ctx_id = fence->context->id;
 	fth.in.fence.ip_type = fence->ip_type;
 	fth.in.fence.ip_instance = fence->ip_instance;