diff --git a/client/src/cmddata.c b/client/src/cmddata.c
index ef52a0d8d..a6f93592f 100644
--- a/client/src/cmddata.c
+++ b/client/src/cmddata.c
@@ -424,7 +424,7 @@ int ASKDemod_ext(int clk, int invert, int maxErr, size_t maxlen, bool amplify, b
 
     int start_idx = 0;
     int errCnt = askdemod_ext(bits, &bitlen, &clk, &invert, maxErr, askamp, askType, &start_idx);
-    if (start_idx >- clk / 2) {
+    if (start_idx >= clk / 2) {
         start_idx -= clk / 2;
     }
     if ( askType == 0 ) { // if not Manchester, clock width is halved