diff --git a/avr/recv.c b/avr/recv.c
index 6d5046a..27fbce0 100644
--- a/avr/recv.c
+++ b/avr/recv.c
@@ -69,10 +69,10 @@ ISR(SPI_STC_vect) {
 
             if (tabby_avr_printer_packet_toolarge(header.type, header.size)) {
                 i = 0;
+            } else {
+                i++;
             }
 
-            i++;
-
             break;
         }
 
diff --git a/avr/send.c b/avr/send.c
index 91476ab..fcbfffb 100644
--- a/avr/send.c
+++ b/avr/send.c
@@ -113,13 +113,14 @@ int main() {
 
             case 5: {
                 header.size |= c << 8;
-                i++;
 
                 if (tabby_avr_printer_packet_toolarge(header.type,
                                                       header.size)) {
                                i = 0;
                                b = 0;
                     sheet_offset = 0;
+                } else {
+                    i++;
                 }
 
                 break;