diff --git a/sys/x86/x86/mca.c b/sys/x86/x86/mca.c
index 1f8bdf38ffcf..bece5d490051 100644
--- a/sys/x86/x86/mca.c
+++ b/sys/x86/x86/mca.c
@@ -533,7 +533,7 @@ cmci_update(enum scan_mode mode, int bank, int valid, struct mca_record *rec)
 	cc = &cmc_state[PCPU_GET(cpuid)][bank];
 	ctl = rdmsr(MSR_MC_CTL2(bank));
 	count = (rec->mr_status & MC_STATUS_COR_COUNT) >> 38;
-	delta = (u_int)(ticks - cc->last_intr);
+	delta = (u_int)(time_uptime - cc->last_intr);
 
 	/*
 	 * If an interrupt was received less than cmc_throttle seconds
@@ -550,7 +550,7 @@ cmci_update(enum scan_mode mode, int bank, int valid, struct mca_record *rec)
 			ctl |= limit;
 			wrmsr(MSR_MC_CTL2(bank), ctl);
 		}
-		cc->last_intr = ticks;
+		cc->last_intr = time_uptime;
 		return;
 	}
 
@@ -857,7 +857,7 @@ cmci_resume(int i)
 		return;
 
 	cc = &cmc_state[PCPU_GET(cpuid)][i];
-	cc->last_intr = -ticks;
+	cc->last_intr = 0;
 	ctl = rdmsr(MSR_MC_CTL2(i));
 	ctl &= ~MC_CTL2_THRESHOLD;
 	ctl |= MC_CTL2_CMCI_EN | 1;