diff --git a/doc/src/pair_granular.txt b/doc/src/pair_granular.txt
index f16cd9fe0b..d46bea2343 100644
--- a/doc/src/pair_granular.txt
+++ b/doc/src/pair_granular.txt
@@ -790,4 +790,4 @@ alternative contact force models during inelastic collisions. Powder
 Technology, 233, 30-46.
 
 :link(WaltonPC)
-[(Otis R. Walton)] Walton, O.R., Personal Communication	
+[(Otis R. Walton)] Walton, O.R., Personal Communication