diff --git a/include/config.h b/include/config.h
index 6f1c8e1..c572e1f 100644
--- a/include/config.h
+++ b/include/config.h
@@ -43,7 +43,7 @@
 // R1 so LFSR on GDO0 keys the PA (broad AM sidebands). Set JAM_R1_USE_OOK 0 for 2-FSK only at JAM_DEV_KHZ_R1_WIDE.
 // Fobs may sit on 314.8–315.2 MHz — measure with an SDR and retune JAM_LOCK_FREQ_1_MHZ if needed.
 #define JAM_LOCK_FREQ_1_MHZ    315.0f
-#define JAM_LOCK_FREQ_2_MHZ    315.0f
+#define JAM_LOCK_FREQ_2_MHZ    433.92f
 #define JAM_DEV_KHZ_R2_WIDE    380.0f
 #define JAM_DEV_KHZ_R1_NARROW  25.0f   // probe / RadioLib begin() only
 #define JAM_DEV_KHZ_R1_WIDE    200.0f  // FSK jam spread when JAM_R1_USE_OOK is 0 (or OOK setup fails)