diff --git a/src/types.h b/src/types.h
index c39ade9..15f7bfe 100644
--- a/src/types.h
+++ b/src/types.h
@@ -32,6 +32,10 @@
 #include <Python.h>
 #include <git2.h>
 
+#if !(LIBGIT2_VER_MAJOR == 0 && LIBGIT2_VER_MINOR == 20)
+#error You need a compatible libgit2 version (v0.20.x)
+#endif
+
 /*
  * Python objects
  *