thodg/libgit2

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e98bbc..2ca5354 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -221,6 +221,7 @@ ELSE ()
 	ENABLE_WARNINGS(strict-aliasing)
 	ENABLE_WARNINGS(strict-prototypes)
 	ENABLE_WARNINGS(declaration-after-statement)
+	ENABLE_WARNINGS(shift-count-overflow)
 	DISABLE_WARNINGS(unused-const-variable)
 	DISABLE_WARNINGS(unused-function)