diff --git a/src/npair.cpp b/src/npair.cpp
index 006dc6101f..d98d5716dd 100644
--- a/src/npair.cpp
+++ b/src/npair.cpp
@@ -189,7 +189,7 @@ void NPair::build_setup()
   if (ns) copy_stencil_info();
 
   // set here, since build_setup() always called before build()
-  
+
   last_build = update->ntimestep;
 }