diff --git a/src/util/virfile.c b/src/util/virfile.c
index eb88c83981ec904423b826e45c7c353c36785577..463791976c603845b56e19eb5a291f0a87ed237a 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -59,6 +59,8 @@
 #include "virstoragefile.h"
 #include "virutil.h"
 
+#include "c-ctype.h"
+
 #define VIR_FROM_THIS VIR_FROM_NONE
 
 int virFileClose(int *fdptr, virFileCloseFlags flags)