diff --git a/firmware/common/max2837_regs.def b/firmware/common/max2837_regs.def
index 097be4f7..42dbec34 100644
--- a/firmware/common/max2837_regs.def
+++ b/firmware/common/max2837_regs.def
@@ -255,7 +255,7 @@ __MREG__(MAX2837_SYN_BIAS_TRIM,20,9,2) // 00=max 10=default 11=min
 /* REG 21 */
 __MREG__(MAX2837_SYN_CP_COMMON_MODE_EN,21,0,1)
 __MREG__(MAX2837_SYN_PRESCALER_BIAS_BOOST,21,1,1)  // 0=default 1=+20%
-__MREG__(MAX2837_SYN_CP_BETA_EN,21,2,0)
+__MREG__(MAX2837_SYN_CP_BETA_EN,21,2,1)
 __MREG__(MAX2837_SYN_SD_CLOCK_SEL,21,3,1)
 #define MAX2837_SYN_SD_CLOCK_PFD 0  // from PFD reset
 #define MAX2837_SYN_SD_CLOCK_PRE 1  // from prescaler