diff --git a/src/backend.c b/src/backend.c
index d870602e0..bc1064c34 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -5020,7 +5020,9 @@ int run_opencl_kernel_atinit (hashcat_ctx_t *hashcat_ctx, hc_device_param_t *dev
 
   if (hc_clSetKernelArg (hashcat_ctx, kernel, 1, sizeof (cl_ulong), device_param->kernel_params_atinit[1]) == -1) return -1;
 
-  return hc_clEnqueueNDRangeKernel (hashcat_ctx, device_param->opencl_command_queue, kernel, 1, NULL, global_work_size, local_work_size, 0, NULL, NULL);
+  if (hc_clEnqueueNDRangeKernel (hashcat_ctx, device_param->opencl_command_queue, kernel, 1, NULL, global_work_size, local_work_size, 0, NULL, NULL) == -1) return -1;
+
+  return 0;
 }
 
 int run_opencl_kernel_utf8toutf16le (hashcat_ctx_t *hashcat_ctx, hc_device_param_t *device_param, cl_mem buf, const u64 num)
@@ -5042,7 +5044,9 @@ int run_opencl_kernel_utf8toutf16le (hashcat_ctx_t *hashcat_ctx, hc_device_param
 
   if (hc_clSetKernelArg (hashcat_ctx, kernel, 1, sizeof (cl_ulong), device_param->kernel_params_utf8toutf16le[1]) == -1) return -1;
 
-  return hc_clEnqueueNDRangeKernel (hashcat_ctx, device_param->opencl_command_queue, kernel, 1, NULL, global_work_size, local_work_size, 0, NULL, NULL);
+  if (hc_clEnqueueNDRangeKernel (hashcat_ctx, device_param->opencl_command_queue, kernel, 1, NULL, global_work_size, local_work_size, 0, NULL, NULL) == -1) return -1;
+
+  return 0;
 }
 
 int run_opencl_kernel_memset (hashcat_ctx_t *hashcat_ctx, hc_device_param_t *device_param, cl_mem buf, const u64 offset, const u8 value, const u64 size)