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-rw-r--r--src/XrrConfig.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/XrrConfig.c b/src/XrrConfig.c
index 34ff3ef..793d8b6 100644
--- a/src/XrrConfig.c
+++ b/src/XrrConfig.c
@@ -105,7 +105,7 @@ static XRRScreenConfiguration *_XRRValidateCache (Display *dpy,
XRRScreenConfiguration **configs;
XRandRInfo *xrri;
- if (XextHasExtension(info)) {
+ if ((screen >= 0) && (screen < ScreenCount(dpy)) && XextHasExtension(info)) {
xrri = (XRandRInfo *) info->data;
configs = xrri->config;