diff --git a/Modem/compression/heatshrink_encoder.c b/Modem/compression/heatshrink_encoder.c
index f2cc24f..9eed0d1 100644
--- a/Modem/compression/heatshrink_encoder.c
+++ b/Modem/compression/heatshrink_encoder.c
@@ -527,7 +527,7 @@ static uint16_t find_longest_match(heatshrink_encoder *hse, uint16_t start,
         pos = hsi->index[pos];
     }
 #else    
-    for (int16_t pos=end - 1; pos >= start; pos--) {
+    for (int16_t pos=end - 1; pos >= (int16_t)start; pos--) {
         for (len=0; len<maxlen; len++) {
             if (0) {
                 LOG("  --> cmp buf[%d] == 0x%02x against %02x (start %u)\n",
diff --git a/buildrev.h b/buildrev.h
index 1ba7886..9c41eb0 100644
--- a/buildrev.h
+++ b/buildrev.h
@@ -1,2 +1,2 @@
-#define VERS_BUILD 1739
+#define VERS_BUILD 1742
 #define VERS_HOST  "shard"