diff --git a/libraries/AP_GPS/AP_GPS_MTK19.cpp b/libraries/AP_GPS/AP_GPS_MTK19.cpp
index 5312954c00..6727978e24 100644
--- a/libraries/AP_GPS/AP_GPS_MTK19.cpp
+++ b/libraries/AP_GPS/AP_GPS_MTK19.cpp
@@ -19,7 +19,7 @@
 //
 //    GPS configuration : Custom protocol per "DIYDrones Custom Binary Sentence Specification V1.6, v1.7, v1.8, v1.9"
 //
-//   Note that this driver supports both the 1.6 and 1.9 protocol varients
+//   Note that this driver supports both the 1.6 and 1.9 protocol variants
 //
 
 #include "AP_GPS_MTK.h"
diff --git a/libraries/AP_GPS/AP_GPS_UBLOX.h b/libraries/AP_GPS/AP_GPS_UBLOX.h
index f51352082c..2c6ca15f60 100644
--- a/libraries/AP_GPS/AP_GPS_UBLOX.h
+++ b/libraries/AP_GPS/AP_GPS_UBLOX.h
@@ -39,10 +39,10 @@
  */
 #define UBLOX_SET_BINARY_115200 "\265\142\006\001\003\000\001\006\001\022\117$PUBX,41,1,0023,0001,115200,0*1C\r\n"
 
-// a varient with 230400 baudrate
+// a variant with 230400 baudrate
 #define UBLOX_SET_BINARY_230400 "\265\142\006\001\003\000\001\006\001\022\117$PUBX,41,1,0023,0001,230400,0*1E\r\n"
 
-// a varient with 460800 baudrate
+// a variant with 460800 baudrate
 #define UBLOX_SET_BINARY_460800 "\265\142\006\001\003\000\001\006\001\022\117$PUBX,41,1,0023,0001,460800,0*11\r\n"
 
 #define UBLOX_RXM_RAW_LOGGING 1