diff --git a/src/cdi_datetime.c b/src/cdi_datetime.c
index e5d08a4e7a6a39a9050236d2d46da2ac7267ee2b..8e8576d56dff9424ee0e025e6d9f66d0d20e57ad 100644
--- a/src/cdi_datetime.c
+++ b/src/cdi_datetime.c
@@ -232,12 +232,12 @@ cdiDateTime_isNull(const CdiDateTime cdiDateTime)
 {
   // clang-format off
   return (cdiDateTime.date.year == 0
-      && cdiDateTime.date.month == 0
-      && cdiDateTime.date.day == 0
-      && cdiDateTime.time.hour == 0
-      && cdiDateTime.time.minute == 0
-      && cdiDateTime.time.second == 0
-      && cdiDateTime.time.ms == 0);
+       && cdiDateTime.date.month == 0
+       && cdiDateTime.date.day == 0
+       && cdiDateTime.time.hour == 0
+       && cdiDateTime.time.minute == 0
+       && cdiDateTime.time.second == 0
+       && cdiDateTime.time.ms == 0);
   // clang-format on
 }