diff --git a/dsp/cmDspBuiltIn.c b/dsp/cmDspBuiltIn.c
index 027215b..ad98218 100644
--- a/dsp/cmDspBuiltIn.c
+++ b/dsp/cmDspBuiltIn.c
@@ -5377,6 +5377,7 @@ cmDspClassConsFunc_t _cmDspClassBuiltInArray[] =
   cmGSwitchClassCons,
   cmScaleRangeClassCons,
   cmActiveMeasClassCons,
+  cmAmSyncClassCons,
   NULL,
 };