diff -dpruN slock~/config.h slock/config.h
--- slock~/config.h	1970-01-01 01:00:00.000000000 +0100
+++ slock/config.h	2008-04-10 06:41:24.000000000 +0200
@@ -0,0 +1 @@
+#define DPMS	False
diff -dpruN slock~/slock.c slock/slock.c
--- slock~/slock.c	2008-04-10 06:52:22.000000000 +0200
+++ slock/slock.c	2008-04-10 05:24:24.000000000 +0200
@@ -22,6 +22,8 @@
 #include <bsd_auth.h>
 #endif
 
+#include "config.h"
+
 void
 eprint(const char *errstr, ...) {
 	va_list ap;
@@ -125,10 +127,8 @@ main(int argc, char **argv) {
 
 	/* main event loop */
 	while(running && !XNextEvent(dpy, &ev)) {
-		if(len == 0 && DPMSCapable(dpy)) {
-			DPMSEnable(dpy);
+		if(DPMS && len == 0)
 			DPMSForceLevel(dpy, DPMSModeOff);
-		}
 		if(ev.type == KeyPress) {
 			buf[0] = 0;
 			num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);