diff --git a/examples/client.c b/examples/client.c
index 1976fa41..615bcb77 100644
--- a/examples/client.c
+++ b/examples/client.c
@@ -219,9 +219,9 @@ static int on_frame_send_callback(nghttp2_session *session,
       const nghttp2_nv *nva = frame->headers.nva;
       printf("[INFO] C ----------------------------> S (HEADERS)\n");
       for (i = 0; i < frame->headers.nvlen; ++i) {
-        fwrite(nva[i].name, nva[i].namelen, 1, stdout);
+        fwrite(nva[i].name, 1, nva[i].namelen, stdout);
         printf(": ");
-        fwrite(nva[i].value, nva[i].valuelen, 1, stdout);
+        fwrite(nva[i].value, 1, nva[i].valuelen, stdout);
         printf("\n");
       }
     }
@@ -249,9 +249,9 @@ static int on_frame_recv_callback(nghttp2_session *session,
       if (req) {
         printf("[INFO] C <---------------------------- S (HEADERS)\n");
         for (i = 0; i < frame->headers.nvlen; ++i) {
-          fwrite(nva[i].name, nva[i].namelen, 1, stdout);
+          fwrite(nva[i].name, 1, nva[i].namelen, stdout);
           printf(": ");
-          fwrite(nva[i].value, nva[i].valuelen, 1, stdout);
+          fwrite(nva[i].value, 1, nva[i].valuelen, stdout);
           printf("\n");
         }
       }
diff --git a/examples/deflate.c b/examples/deflate.c
index 535e984b..6206ba47 100644
--- a/examples/deflate.c
+++ b/examples/deflate.c
@@ -109,9 +109,9 @@ static void deflate(nghttp2_hd_deflater *deflater,
   printf("Input (%zu byte(s)):\n\n", sum);
 
   for (i = 0; i < nvlen; ++i) {
-    fwrite(nva[i].name, nva[i].namelen, 1, stdout);
+    fwrite(nva[i].name, 1, nva[i].namelen, stdout);
     printf(": ");
-    fwrite(nva[i].value, nva[i].valuelen, 1, stdout);
+    fwrite(nva[i].value, 1, nva[i].valuelen, stdout);
     printf("\n");
   }
 
@@ -186,9 +186,9 @@ int inflate_header_block(nghttp2_hd_inflater *inflater, uint8_t *in,
     inlen -= proclen;
 
     if (inflate_flags & NGHTTP2_HD_INFLATE_EMIT) {
-      fwrite(nv.name, nv.namelen, 1, stderr);
+      fwrite(nv.name, 1, nv.namelen, stderr);
       fprintf(stderr, ": ");
-      fwrite(nv.value, nv.valuelen, 1, stderr);
+      fwrite(nv.value, 1, nv.valuelen, stderr);
       fprintf(stderr, "\n");
     }
 
diff --git a/examples/libevent-client.c b/examples/libevent-client.c
index 8fbef879..0b03f7de 100644
--- a/examples/libevent-client.c
+++ b/examples/libevent-client.c
@@ -179,9 +179,9 @@ static void delete_http2_session_data(http2_session_data *session_data) {
 
 static void print_header(FILE *f, const uint8_t *name, size_t namelen,
                          const uint8_t *value, size_t valuelen) {
-  fwrite(name, namelen, 1, f);
+  fwrite(name, 1, namelen, f);
   fprintf(f, ": ");
-  fwrite(value, valuelen, 1, f);
+  fwrite(value, 1, valuelen, f);
   fprintf(f, "\n");
 }
 
@@ -272,7 +272,7 @@ static int on_data_chunk_recv_callback(nghttp2_session *session _U_,
                                        void *user_data) {
   http2_session_data *session_data = (http2_session_data *)user_data;
   if (session_data->stream_data->stream_id == stream_id) {
-    fwrite(data, len, 1, stdout);
+    fwrite(data, 1, len, stdout);
   }
   return 0;
 }
diff --git a/lib/nghttp2_hd.c b/lib/nghttp2_hd.c
index d8cfe24d..59f7f379 100644
--- a/lib/nghttp2_hd.c
+++ b/lib/nghttp2_hd.c
@@ -994,7 +994,7 @@ static int emit_string(nghttp2_bufs *bufs, const uint8_t *str, size_t len) {
   blocklen = count_encoded_length(enclen, 7);
 
   DEBUGF(fprintf(stderr, "deflatehd: emit string str="));
-  DEBUGF(fwrite(str, len, 1, stderr));
+  DEBUGF(fwrite(str, 1, len, stderr));
   DEBUGF(fprintf(stderr, ", length=%zu, huffman=%d, encoded_length=%zu\n", len,
                  huffman, enclen));