diff --git a/dsp.c b/dsp.c
index 9c74467ed00ba1b6c96b2f54b9113babe8072be2..b1bdacef0eac4906b640ae0130ab74a2045125e1 100755
--- a/dsp.c
+++ b/dsp.c
@@ -97,7 +97,7 @@ static struct progress {
 #define BUSY_PAT_PERCENT	7	/* The percentage difference between measured and actual pattern */
 #define BUSY_THRESHOLD		100	/* Max number of ms difference between max and min times in busy */
 #define BUSY_MIN		75	/* Busy must be at least 80 ms in half-cadence */
-#define BUSY_MAX		1100	/* Busy can't be longer than 1100 ms in half-cadence */
+#define BUSY_MAX		3100	/* Busy can't be longer than 3100 ms in half-cadence */
 
 /* Remember last 15 units */
 #define DSP_HISTORY 		15