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-rw-r--r--src/references.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/references.cc b/src/references.cc
index 8934d53061cd..be432665b884 100644
--- a/src/references.cc
+++ b/src/references.cc
@@ -1,3 +1,4 @@
+#include <cerrno>
 #include <map>
 
 #include <sys/types.h>