--- share/top/ffG53a6.rtp	2009-05-30 13:44:42.000000000 +0400
+++ share/top/ffG53a6.rtp	2009-06-18 13:55:05.000000000 +0400
@@ -35,8 +35,8 @@
  [ dihedrals ]
     -CA -C N H1 gd_14
  [ impropers ]
-    -C -O N -CA gi_1
-     N  H H  -C gi_1
+    -C -O  N -CA gi_1
+     N  H1 H2 -C gi_1
 
 [ ALA ]
  [ atoms ]