diff --git a/gen_pack.sh b/gen_pack.sh
index 1352df8..d5e2f08 100755
--- a/gen_pack.sh
+++ b/gen_pack.sh
@@ -47,6 +47,7 @@ PACKCHK_ARGS=()
 # Specify additional dependencies for packchk
 PACKCHK_DEPS="
   ARM.CMSIS.pdsc
+  ARM.CMSIS-RTX.pdsc
   Keil.STM32F2xx_DFP.pdsc
   Keil.STM32F4xx_DFP.pdsc
   Keil.STM32F7xx_DFP.pdsc