diff --git a/ostd/range.hh b/ostd/range.hh
index 2cdbee2..ed5db82 100644
--- a/ostd/range.hh
+++ b/ostd/range.hh
@@ -662,8 +662,8 @@ public:
     RangeSize<Rtype> size() const { return p_end - p_beg; }
 
     HalfRange<Rtype>
-    slice(RangeSize<Rtype> start, RangeSize<Rtype> p_end) const {
-        return HalfRange<Rtype>(p_beg + start, p_beg + p_end);
+    slice(RangeSize<Rtype> start, RangeSize<Rtype> end) const {
+        return HalfRange<Rtype>(p_beg + start, p_beg + end);
     }
 
     RangeReference<Rtype> operator[](RangeSize<Rtype> idx) const {
diff --git a/ostd/stream.hh b/ostd/stream.hh
index 6b309ef..86bbc50 100644
--- a/ostd/stream.hh
+++ b/ostd/stream.hh
@@ -36,7 +36,7 @@ struct StreamRange;
 namespace detail {
     template<Size N>
     struct FormatOutRange: OutputRange<FormatOutRange<N>, char> {
-        FormatOutRange(char *buf): buf(buf), idx(0) {}
+        FormatOutRange(char *ibuf): buf(ibuf), idx(0) {}
         FormatOutRange(const FormatOutRange &r): buf(r.buf), idx(r.idx) {}
         char *buf;
         Size idx;