diff --git a/PDP11/pdp11_io_lib.c b/PDP11/pdp11_io_lib.c
index dc829ffb..ea2ab357 100644
--- a/PDP11/pdp11_io_lib.c
+++ b/PDP11/pdp11_io_lib.c
@@ -794,7 +794,6 @@ AUTO_CON *autp;
 DEVICE *dptr;
 DIB *dibp;
 uint32 j, k;
-int v;
 
 if (done)
     return;
@@ -809,8 +808,12 @@ for (j = 0; (dptr = sim_devices[j]) != NULL; j++) {
                 ilvl = dibp->vloc / 32;
                 ibit = dibp->vloc % 32;
 #if (VEC_SET != 0)
-                for (v=0; v<MAX(dibp->vnum, 1); v++)
-                    int_vec_set[ilvl][ibit+v] = VEC_SET;
+                if (1) {
+                    int v;
+                    
+                    for (v=0; v<MAX(dibp->vnum, 1); v++)
+                        int_vec_set[ilvl][ibit+v] = VEC_SET;
+                    }
 #endif
                 break;
                 }