diff --git a/cmd-sleep.c b/cmd-sleep.c
index 16f377e..ce653d7 100644
--- a/cmd-sleep.c
+++ b/cmd-sleep.c
@@ -1,11 +1,10 @@
 #include <string.h>
 #include "bionic.h"
-#include "memio.h"
 #include "printf.h"
 
 int cmd_msleep(int argc, char **argv)
 {
-	uint32_t msecs, i, j;
+	uint32_t msecs;
 
 	if (argc != 1) {
 		printf("Usage: msleep [milliseconds]\n");
@@ -13,19 +12,13 @@ int cmd_msleep(int argc, char **argv)
 	}
 
 	msecs = _strtoul(argv[0], NULL, 0);
-
-	for (i = 0; i < msecs; i++) {
-		for (j = 0; j < 73000; j++) {
-			asm("nop");
-		}
-	}
-
+	_msleep(msecs);
 	return 0;
 }
 
 int cmd_usleep(int argc, char **argv)
 {
-	uint32_t usecs, i, j;
+	uint32_t usecs;
 
 	if (argc != 1) {
 		printf("Usage: usleep [microseconds]\n");
@@ -33,12 +26,6 @@ int cmd_usleep(int argc, char **argv)
 	}
 
 	usecs = _strtoul(argv[0], NULL, 0);
-
-	for (i = 0; i < usecs; i++) {
-		for (j = 0; j < 73; j++) {
-			asm("nop");
-		}
-	}
-
+	_usleep(usecs);
 	return 0;
 }