diff --git a/src/modules/mavlink/streams/GPS2_RAW.hpp b/src/modules/mavlink/streams/GPS2_RAW.hpp
index 025421e471..9ae6f37792 100644
--- a/src/modules/mavlink/streams/GPS2_RAW.hpp
+++ b/src/modules/mavlink/streams/GPS2_RAW.hpp
@@ -68,7 +68,7 @@ private:
 		hrt_abstime now{};
 
 		if (_sensor_gps_sub.update(&gps)) {
-			if (gps.time_utc_usec > 0) {
+			if (gps.time_utc_usec <= 0) {
 				msg.time_usec = gps.timestamp;
 
 			} else {
diff --git a/src/modules/mavlink/streams/GPS_RAW_INT.hpp b/src/modules/mavlink/streams/GPS_RAW_INT.hpp
index a3b7620fb7..6f68fe1c83 100644
--- a/src/modules/mavlink/streams/GPS_RAW_INT.hpp
+++ b/src/modules/mavlink/streams/GPS_RAW_INT.hpp
@@ -68,7 +68,7 @@ private:
 		hrt_abstime now{};
 
 		if (_sensor_gps_sub.update(&gps)) {
-			if (gps.time_utc_usec > 0) {
+			if (gps.time_utc_usec <= 0) {
 				msg.time_usec = gps.timestamp;
 
 			} else {