diff --git a/cpu/ppc4xx/uic.c b/cpu/ppc4xx/uic.c
index 7944c6c3c2..a95d1cb17d 100644
--- a/cpu/ppc4xx/uic.c
+++ b/cpu/ppc4xx/uic.c
@@ -129,11 +129,11 @@ void external_interrupt(struct pt_regs *regs)
 		uic_interrupt(UIC3_DCR_BASE, 96);
 #endif
 
+	mtdcr(uic0sr, (uic_msr & UICB0_ALL));
+
 	if (uic_msr & ~(UICB0_ALL))
 		uic_interrupt(UIC0_DCR_BASE, 0);
 
-	mtdcr(uic0sr, uic_msr);
-
 	return;
 }