diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/Makefile b/bacnet-stack/ports/bdk-atxx4-mstp/Makefile
index 066d267b..c68c655b 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/Makefile
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/Makefile
@@ -176,6 +176,7 @@ BFLAGS = -DBACDL_MSTP
 BFLAGS += -DMAX_APDU=128
 BFLAGS += -DBIG_ENDIAN=0
 BFLAGS += -DMAX_TSM_TRANSACTIONS=0
+#BFLAGS += -DMAX_ANALOG_INPUTS=48
 #BFLAGS += -DCRC_USE_TABLE
 BFLAGS += -DBACAPP_BOOLEAN
 BFLAGS += -DBACAPP_REAL
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c b/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c
index b2dcee6a..02d581a1 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c
@@ -143,6 +143,8 @@ void bacnet_task(
         button_value = input_button_value(i);
         if (button_value) {
             binary_value = BINARY_ACTIVE;
+        } else {
+            binary_value = BINARY_INACTIVE;
         }
         Binary_Input_Present_Value_Set(i, binary_value);
     }