diff --git a/RX_FSK/src/M10M20.cpp b/RX_FSK/src/M10M20.cpp
index b6e2c0f..489bc99 100644
--- a/RX_FSK/src/M10M20.cpp
+++ b/RX_FSK/src/M10M20.cpp
@@ -556,6 +556,7 @@ int M10M20::decodeframeM20(uint8_t *data) {
 	}
 	Serial.println(crcok?"CRC OK":"CRC NOT OK");
         Serial.printf(" repair: %d/%d\n", repl, repairstep);
+        if(!crcok) return 2;
 
 	Serial.println("Decoding...");
 	// Its a M20
diff --git a/RX_FSK/version.h b/RX_FSK/version.h
index 7b2c646..367a053 100644
--- a/RX_FSK/version.h
+++ b/RX_FSK/version.h
@@ -1,4 +1,4 @@
 const char *version_name = "rdzTTGOsonde";
-const char *version_id = "devel20220121";
+const char *version_id = "devel20220123";
 const int SPIFFS_MAJOR=2;
 const int SPIFFS_MINOR=16;