1 files changed, 4 insertions, 0 deletions

diff --git a/io.c b/io.c
index 0d97b16e6a..58634bbc58 100644
--- a/io.c
+++ b/io.c
@@ -72,6 +72,10 @@
 #endif
 
 #ifdef HAVE_UNISTD_H
+#ifdef HAVE_SYSCALL_H
+#include <syscall.h>
+#endif
+
 #include <unistd.h>
 #endif