diff --git a/vm/pc/dump.c b/vm/pc/dump.c
index 5421680..83dfa03 100644
--- a/vm/pc/dump.c
+++ b/vm/pc/dump.c
@@ -27,13 +27,13 @@ void dump_instr(ctx_t *ctx,
                 uint cond,
                 ulong pc)
 {
-    log("0x%lX: ", pc);
+    log("0x%lX:\t", pc);
 
     if (lock)
         log("lock");
 
 #ifndef _ATT_STYLE
-    log("%s\t", in->name);
+    log("%s", in->name);
 #else
     char s1[2] = {0, 0}, s2[2] = {0, 0};
 
@@ -43,7 +43,7 @@ void dump_instr(ctx_t *ctx,
     if (p2 && ACC_IS_MEM(p2))
         s2[0] = getmempref(p2->mlen);
 
-    log("%s%s%s\t", in->name, s1, s2);
+    log("%s%s%s", in->name, s1, s2);
 #endif
 
     if (rep)
@@ -70,6 +70,7 @@ void dump_instr(ctx_t *ctx,
     else
         log("\t");
 
+    if (p1) {
 #ifndef _ATT_STYLE
         dump_acc(ctx, p1);
         if (p2) {