diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c
index 360a46c..513ce58 100644
--- a/hw/m68k/next-cube.c
+++ b/hw/m68k/next-cube.c
@@ -177,17 +177,17 @@
 
 static void next_scr2_rtc_update(NeXTPC *s)
 {
-    uint8_t old_scr2, scr2_2;
+    uint8_t old_scr2_rtc, scr2_rtc;
 
-    old_scr2 = extract32(s->old_scr2, 8, 8);
-    scr2_2 = extract32(s->scr2, 8, 8);
+    old_scr2_rtc = extract32(s->old_scr2, 8, 8);
+    scr2_rtc = extract32(s->scr2, 8, 8);
 
-    if (scr2_2 & 0x1) {
+    if (scr2_rtc & 0x1) {
         /* DPRINTF("RTC %x phase %i\n", scr2_2, rtc->phase); */
         /* If we are in going down clock... do something */
-        if (((old_scr2 & SCR2_RTCLK) != (scr2_2 & SCR2_RTCLK)) &&
-                ((scr2_2 & SCR2_RTCLK) == 0)) {
-            if (scr2_2 & SCR2_RTDATA) {
+        if (((old_scr2_rtc & SCR2_RTCLK) != (scr2_rtc & SCR2_RTCLK)) &&
+                ((scr2_rtc & SCR2_RTCLK) == 0)) {
+            if (scr2_rtc & SCR2_RTDATA) {
                 qemu_irq_raise(s->rtc_data_irq);
             } else {
                 qemu_irq_lower(s->rtc_data_irq);