diff --git a/pygmt/src/ternary.py b/pygmt/src/ternary.py
index a9f91f091c7..c52050d8c0f 100644
--- a/pygmt/src/ternary.py
+++ b/pygmt/src/ternary.py
@@ -50,7 +50,7 @@ def ternary(self, data, **kwargs):
         counter-clockwise direction].
     region : str or list
         [*amin*, *amax*, *bmin*, *bmax*, *cmin*, *cmax*].
-        Give the min and max limits for each of the three axes **a**, **b**, 
+        Give the min and max limits for each of the three axes **a**, **b**,
         and **c**.
     {CPT}
     {G}