diff --git a/platforms/stm32-f103rb-nucleo/btstack-config.h b/platforms/stm32-f103rb-nucleo/btstack-config.h
index c804f5663..1cdf830b9 100644
--- a/platforms/stm32-f103rb-nucleo/btstack-config.h
+++ b/platforms/stm32-f103rb-nucleo/btstack-config.h
@@ -19,6 +19,7 @@
 // 
 #define MAX_SPP_CONNECTIONS 1
 #define MAX_NO_GATT_CLIENTS 0
+#define MAX_NO_GATT_SUBCLIENTS 0
 #define MAX_NO_HCI_CONNECTIONS MAX_SPP_CONNECTIONS
 #define MAX_NO_L2CAP_SERVICES  2
 #define MAX_NO_L2CAP_CHANNELS  (1+MAX_SPP_CONNECTIONS)