diff --git a/hdf5.spec b/hdf5.spec
index 081809d..750d34a 100644
--- a/hdf5.spec
+++ b/hdf5.spec
@@ -27,11 +27,11 @@
 
 # TODO: The so numbers autodetected by update_so_version.sh
 # do not match the so numbers that are actually buit.
-%define sonum 100
-%define sonum_CXX 100
-%define sonum_F 100
+%define sonum 101
+%define sonum_CXX 101
+%define sonum_F 101
 %define sonum_HL 100
-%define sonum_HL_CXX 100
+%define sonum_HL_CXX 101
 %define sonum_HL_F 100
 %define sonum_TOOLS 100