diff --git a/iseq.c b/iseq.c
index afe03777fc..0ec48da585 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1011,17 +1011,17 @@ remove_coverage_i(void *vstart, void *vend, size_t stride, void *data)
 {
     VALUE v = (VALUE)vstart;
     for (; v != (VALUE)vend; v += stride) {
-	void *ptr = poisoned_object_p(v);
-	unpoison_object(v, false);
+        void *ptr = poisoned_object_p(v);
+        unpoison_object(v, false);
 
 	if (rb_obj_is_iseq(v)) {
             rb_iseq_t *iseq = (rb_iseq_t *)v;
             ISEQ_COVERAGE_SET(iseq, Qnil);
 	}
 
-	if (ptr) {
-	    poison_object(v);
-	}
+        if (ptr) {
+            poison_object(v);
+        }
     }
     return 0;
 }
@@ -3163,16 +3163,16 @@ trace_set_i(void *vstart, void *vend, size_t stride, void *data)
 
     VALUE v = (VALUE)vstart;
     for (; v != (VALUE)vend; v += stride) {
-	void *ptr = poisoned_object_p(v);
-	unpoison_object(v, false);
+        void *ptr = poisoned_object_p(v);
+        unpoison_object(v, false);
 
 	if (rb_obj_is_iseq(v)) {
 	    rb_iseq_trace_set(rb_iseq_check((rb_iseq_t *)v), turnon_events);
 	}
 
-	if (ptr) {
-	    poison_object(v);
-	}
+        if (ptr) {
+            poison_object(v);
+        }
     }
     return 0;
 }