diff --git a/apps/examples/modbus/modbus_main.c b/apps/examples/modbus/modbus_main.c
index 13967f6fd0..2247fd6756 100644
--- a/apps/examples/modbus/modbus_main.c
+++ b/apps/examples/modbus/modbus_main.c
@@ -217,7 +217,7 @@ static inline int modbus_initialize(void)
   /* Enable FreeModBus */
 
   mberr = eMBEnable();
-  if (mberr == MB_ENOERR)
+  if (mberr != MB_ENOERR)
     {
       fprintf(stderr, "modbus_main: "
               "ERROR: eMBEnable failed: %d\n", mberr);
@@ -267,6 +267,8 @@ static void *modbus_pollthread(void *pvarg)
       return NULL;
     }
 
+  srand(time(NULL));
+
   /* Then loop until we are commanded to shutdown */
 
   do
diff --git a/apps/modbus/mb.c b/apps/modbus/mb.c
index 8417d12749..54e96460d5 100644
--- a/apps/modbus/mb.c
+++ b/apps/modbus/mb.c
@@ -99,7 +99,7 @@ static xMBFunctionHandler xFuncHandlers[CONFIG_MB_FUNC_HANDLERS_MAX] = {
 #ifdef CONFIG_MB_FUNC_OTHER_REP_SLAVEID_ENABLED
     {MB_FUNC_OTHER_REPORT_SLAVEID, eMBFuncReportSlaveID},
 #endif
-#ifdef CONFIG_MB_FUNC_READ_INPUT_ENABLE
+#ifdef CONFIG_MB_FUNC_READ_INPUT_ENABLED
     {MB_FUNC_READ_INPUT_REGISTER, eMBFuncReadInputRegister},
 #endif
 #ifdef CONFIG_MB_FUNC_READ_HOLDING_ENABLED