diff --git a/PBGitRevList.mm b/PBGitRevList.mm
index 10dd655..b787e59 100644
--- a/PBGitRevList.mm
+++ b/PBGitRevList.mm
@@ -17,6 +17,8 @@
 #include <string>
 #include <map>
 
+#include <git2/errors.h>
+
 using namespace std;