diff --git a/libavformat/internal.h b/libavformat/internal.h
index d14dee5422..cc8c8f4b43 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -696,13 +696,13 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index,
  * (numerator or denominator are non-positive), it leaves the stream
  * unchanged.
  *
- * @param s stream
+ * @param st stream
  * @param pts_wrap_bits number of bits effectively used by the pts
  *        (used for wrap control)
  * @param pts_num time base numerator
  * @param pts_den time base denominator
  */
-void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
+void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits,
                          unsigned int pts_num, unsigned int pts_den);
 
 /**
diff --git a/libavformat/utils.c b/libavformat/utils.c
index b0814d7bc2..3e6b6a1e23 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1143,30 +1143,30 @@ int ff_hex_to_data(uint8_t *data, const char *p)
     return len;
 }
 
-void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
+void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits,
                          unsigned int pts_num, unsigned int pts_den)
 {
-    FFStream *const sti = ffstream(s);
+    FFStream *const sti = ffstream(st);
     AVRational new_tb;
     if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
         if (new_tb.num != pts_num)
             av_log(NULL, AV_LOG_DEBUG,
                    "st:%d removing common factor %d from timebase\n",
-                   s->index, pts_num / new_tb.num);
+                   st->index, pts_num / new_tb.num);
     } else
         av_log(NULL, AV_LOG_WARNING,
-               "st:%d has too large timebase, reducing\n", s->index);
+               "st:%d has too large timebase, reducing\n", st->index);
 
     if (new_tb.num <= 0 || new_tb.den <= 0) {
         av_log(NULL, AV_LOG_ERROR,
                "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
                new_tb.num, new_tb.den,
-               s->index);
+               st->index);
         return;
     }
-    s->time_base     = new_tb;
+    st->time_base     = new_tb;
     sti->avctx->pkt_timebase = new_tb;
-    s->pts_wrap_bits = pts_wrap_bits;
+    st->pts_wrap_bits = pts_wrap_bits;
 }
 
 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,