diff --git a/Interdata/id16_cpu.c b/Interdata/id16_cpu.c
index ff63be20..d2929d13 100644
--- a/Interdata/id16_cpu.c
+++ b/Interdata/id16_cpu.c
@@ -596,7 +596,7 @@ while (reason == 0) {                                   /* loop until halted */
     uint32 dev, drom, inc, lim, opnd;
     uint32 op, r1, r1p1, r2, ea = 0, oPC;
     uint32 rslt, t, map;
-    uint32 ir1, ir2, ityp;
+    uint32 ir1, ir2 = 0, ityp;
     int32 sr, st;
 
     if (sim_interval <= 0) {                            /* check clock queue */
diff --git a/Interdata/id32_cpu.c b/Interdata/id32_cpu.c
index 3529f52d..9dc132b6 100644
--- a/Interdata/id32_cpu.c
+++ b/Interdata/id32_cpu.c
@@ -1844,7 +1844,7 @@ else return 0;
 uint32 int_auto (uint32 dev, uint32 cc)
 {
 uint32 addr, vec, by, ccw, ccwa, ccwb;
-uint32 i, hw, tblad, tblen, bufe, st, t;
+uint32 i, hw, tblad, tblen, bufe, st = 0, t;
 int32 bufc;
 uint32 oldPSW = BUILD_PSW (cc);