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-rw-r--r--libX11/src/InitExt.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libX11/src/InitExt.c b/libX11/src/InitExt.c
index 4de46f157..1ad183bdf 100644
--- a/libX11/src/InitExt.c
+++ b/libX11/src/InitExt.c
@@ -32,6 +32,7 @@ from The Open Group.
#include <X11/Xlibint.h>
#include <X11/Xos.h>
#include <stdio.h>
+#include <unistd.h>
/*
* This routine is used to link a extension in so it will be called