---
 softusb-input/main.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/softusb-input/main.c b/softusb-input/main.c
index a0ffb70..3088027 100644
--- a/softusb-input/main.c
+++ b/softusb-input/main.c
@@ -575,7 +575,7 @@ static const char keyboard[] PROGMEM = "keyboard\n";
 static const char midi[] PROGMEM = "MIDI\n";
 
 static char validate_configuration_descriptor(const unsigned char *descriptor,
-    char len, struct port_status *p)
+    unsigned char len, struct port_status *p)
 {
        struct ep_status *ep = NULL;
        char offset;
@@ -769,7 +769,7 @@ static void port_service(struct port_status *p, char name)
                case PORT_STATE_GET_CONFIGURATION_DESCRIPTOR: {
                        struct setup_packet packet;
                        unsigned char configuration_descriptor[127];
-                       char len;
+                       unsigned char len;
 
                        packet.bmRequestType = 0x80;
                        packet.bRequest = 0x06;
-- 
1.7.5.4

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