diff --git a/modules/util/infer_cloud_products.py b/modules/util/infer_cloud_products.py
index 6d623743a551f4644b7ced5c5f1c96d8cf86134b..7eaedec383576dc63138c925041b70208f4118d3 100644
--- a/modules/util/infer_cloud_products.py
+++ b/modules/util/infer_cloud_products.py
@@ -38,7 +38,7 @@ def infer_cloud_products(clvrx_path, output_dir, full_disk=True, satellite='GOES
         clvrx_ds = CLAVRx(clvrx_path)
 
     for pname, t_start, t_stop, dto in clvrx_ds:
-        clvrx_str_time = dto.strftime('%Y-%m-%d_%H%M')
+        clvrx_str_time = dto.strftime('%Y-%m-%d_%H:%M')
         out_file = output_dir + 'cloud_fraction_opd_' + clvrx_str_time + '.nc'
 
         t0 = time.time()