diff --git a/miner.h b/miner.h
index 50ca9074..1eb22238 100644
--- a/miner.h
+++ b/miner.h
@@ -1047,8 +1047,8 @@ extern bool add_pool_details(struct pool *pool, bool live, char *url, char *user
 
 #define MIN_INTENSITY 8
 #define MIN_INTENSITY_STR "8"
-#define MAX_INTENSITY 42
-#define MAX_INTENSITY_STR "42"
+#define MAX_INTENSITY 31
+#define MAX_INTENSITY_STR "31"
 
 extern bool hotplug_mode;
 extern int hotplug_time;