diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index 1c82ffa9030..20763b25128 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -712,6 +712,7 @@ rtc_restore(void)
 	writertc(RTC_STATUSB, RTCSB_24HR);
 	writertc(RTC_STATUSA, rtc_statusa);
 	writertc(RTC_STATUSB, rtc_statusb);
+	rtcin(RTC_INTR);
 }
 
 /*
@@ -911,6 +912,7 @@ resettodr()
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, rtc_statusb);
+	rtcin(RTC_INTR);
 }
 
 
@@ -957,6 +959,7 @@ cpu_initclocks()
 		    INTR_TYPE_CLK | INTR_FAST, NULL);
 
 		writertc(RTC_STATUSB, rtc_statusb);
+		rtcin(RTC_INTR);
 	}
 
 	init_TSC_tc();
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c
index 1c82ffa9030..20763b25128 100644
--- a/sys/isa/atrtc.c
+++ b/sys/isa/atrtc.c
@@ -712,6 +712,7 @@ rtc_restore(void)
 	writertc(RTC_STATUSB, RTCSB_24HR);
 	writertc(RTC_STATUSA, rtc_statusa);
 	writertc(RTC_STATUSB, rtc_statusb);
+	rtcin(RTC_INTR);
 }
 
 /*
@@ -911,6 +912,7 @@ resettodr()
 
 	/* Reenable RTC updates and interrupts. */
 	writertc(RTC_STATUSB, rtc_statusb);
+	rtcin(RTC_INTR);
 }
 
 
@@ -957,6 +959,7 @@ cpu_initclocks()
 		    INTR_TYPE_CLK | INTR_FAST, NULL);
 
 		writertc(RTC_STATUSB, rtc_statusb);
+		rtcin(RTC_INTR);
 	}
 
 	init_TSC_tc();