diff --git a/src/data.c b/src/data.c
index 5d4df1886d3..384c2592204 100644
--- a/src/data.c
+++ b/src/data.c
@@ -1442,10 +1442,12 @@ set_internal (Lisp_Object symbol, Lisp_Object newval, Lisp_Object where,
 	    int idx = PER_BUFFER_IDX (offset);
 	    if (idx > 0 && bindflag == SET_INTERNAL_SET
 	        && !PER_BUFFER_VALUE_P (buf, idx))
-	      if (let_shadows_buffer_binding_p (sym))
-	        set_default_internal (symbol, newval, bindflag);
-	      else
-	        SET_PER_BUFFER_VALUE_P (buf, idx, 1);
+	      {
+		if (let_shadows_buffer_binding_p (sym))
+		  set_default_internal (symbol, newval, bindflag);
+		else
+		  SET_PER_BUFFER_VALUE_P (buf, idx, 1);
+	      }
 	  }
 
 	if (voide)