diff --git a/grpc.spec b/grpc.spec
index 87f1724..8d0f0c9 100644
--- a/grpc.spec
+++ b/grpc.spec
@@ -21,6 +21,13 @@ Version:        1.26.0
 Release:        13%{?dist}
 Summary:        RPC library and framework
 
+# CMakeLists.txt: gRPC_CORE_SOVERSION
+%global c_so_version 15
+# CMakeLists.txt: gRPC_CPP_SOVERSION
+%global cpp_so_version 1
+# CMakeLists.txt: gRPC_CSHARP_SOVERSION
+%global csharp_so_version 2
+
 # The entire source is ASL 2.0 except the following:
 #
 # BSD:
@@ -60,9 +67,6 @@ Source0:        %{forgeurl}/archive/v%{version}/%{name}-%{version}.tar.gz
 
 # ~~~~ C (core) and C++ (cpp) ~~~~
 
-%global c_so_version 9
-%global cpp_so_version 1
-
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig
 %if %{with cmake}