diff --git a/slock.c b/slock.c
index 4b8e12e..d5e29ba 100644
--- a/slock.c
+++ b/slock.c
@@ -335,9 +335,9 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
 				XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
 
 			XSelectInput(dpy, lock->root, SubstructureNotifyMask);
-            unsigned int opacity = (unsigned int)(alpha * 0xffffffff);
-            XChangeProperty(dpy, lock->win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False), XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&opacity, 1L);
-            XSync(dpy, False);
+			unsigned int opacity = (unsigned int)(alpha * 0xffffffff);
+			XChangeProperty(dpy, lock->win, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False), XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&opacity, 1L);
+			XSync(dpy, False);
 			return lock;
 		}