diff --git a/client/cmdlf.c b/client/cmdlf.c
index f644fcc84..240a1d402 100644
--- a/client/cmdlf.c
+++ b/client/cmdlf.c
@@ -186,15 +186,18 @@ int CmdLFCommandRead(const char *Cmd) {
 }
 
 int CmdFlexdemod(const char *Cmd) {
-#define LONG_WAIT 100	
+
+	if ( GraphTraceLen < 0 )
+		return 0;
+
+#ifndef LONG_WAIT
+#define LONG_WAIT 100
+#endif
 	int i, j, start, bit, sum, phase = 0;
 
 	int data[GraphTraceLen];
 	memcpy(data, GraphBuffer, GraphTraceLen);
 	
-	if ( GraphTraceLen < 0 )
-		return 0;
-	
 	size_t size = GraphTraceLen;
 	
 	for (i = 0; i < GraphTraceLen; ++i)