diff --git a/src/oceanic_vtpro_parser.c b/src/oceanic_vtpro_parser.c
index 859025e..1f9d7aa 100644
--- a/src/oceanic_vtpro_parser.c
+++ b/src/oceanic_vtpro_parser.c
@@ -333,7 +333,7 @@ oceanic_vtpro_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_
 
 		// Time.
 		if (interval)
-			time += interval;
+			time = timestamp * 60 + (i + 1) * interval;
 		else
 			time = timestamp * 60 + (i + 1) * 60.0 / count + 0.5;
 		sample.time = time;