diff --git a/minadbd/transport.c b/minadbd/transport.c
index 4c0c97f..92679f5 100644
--- a/minadbd/transport.c
+++ b/minadbd/transport.c
@@ -713,7 +713,7 @@
     char *p = ptr;
     int r;
 #if ADB_TRACE
-    int  len0 = len;
+    size_t len0 = len;
 #endif
     D("readx: fd=%d wanted=%d\n", fd, (int)len);
     while(len > 0) {
@@ -734,7 +734,7 @@
     }
 
 #if ADB_TRACE
-    D("readx: fd=%d wanted=%d got=%d\n", fd, len0, len0 - len);
+    D("readx: fd=%d wanted=%zu got=%zu\n", fd, len0, len0 - len);
     dump_hex( ptr, len0 );
 #endif
     return 0;