diff --git a/cpp/shared/s2p_version.cpp b/cpp/shared/s2p_version.cpp
index 72c90a57..9653f1d5 100644
--- a/cpp/shared/s2p_version.cpp
+++ b/cpp/shared/s2p_version.cpp
@@ -11,4 +11,4 @@
 const int s2p_major_version = 3;
 const int s2p_minor_version = 1;
 const int s2p_revision = 0;
-const std::string s2p_suffix = "-devel";
+const std::string s2p_suffix = "-rc1";