diff --git a/src/np_sphere.cpp b/src/np_sphere.cpp
index 0d74bb33358bbcac00d76073320d7b0a3400e2d6..ac985ac4e8b292acd06534aad948586a61d39880 100644
--- a/src/np_sphere.cpp
+++ b/src/np_sphere.cpp
@@ -1,4 +1,4 @@
-/*! \file nptm.cpp
+/*! \file np_sphere.cpp
  */
 
 #include <cstdio>