diff --git a/webserver/core/lib/iec_std_lib.h b/webserver/core/lib/iec_std_lib.h
index 5f685e4..d77a726 100755
--- a/webserver/core/lib/iec_std_lib.h
+++ b/webserver/core/lib/iec_std_lib.h
@@ -57,6 +57,7 @@
  * Include type defs.
  */
 #include "iec_types_all.h"
+#include <sys/time.h>
 
 extern TIME __CURRENT_TIME;
 extern BOOL __DEBUG;
diff --git a/webserver/core/main.cpp b/webserver/core/main.cpp
index 17cbeaa..f897aa4 100644
--- a/webserver/core/main.cpp
+++ b/webserver/core/main.cpp
@@ -28,6 +28,7 @@
 #include <signal.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <stdint.h>
 #include <sys/mman.h>
 
 #include "iec_types.h"
@@ -210,16 +211,16 @@ void RecordCycletimeLatency(long cycle_time, long sleep_latency)
 }
 
 // pointers to IO *array[const][const] from cpp to c and back again don't work as expected, so instead callbacks
-u_int8_t *bool_input_call_back(int a, int b){ return bool_input[a][b]; }
-u_int8_t *bool_output_call_back(int a, int b){ return bool_output[a][b]; }
-u_int8_t *byte_input_call_back(int a){ return byte_input[a]; }
-u_int8_t *byte_output_call_back(int a){ return byte_output[a]; }
-u_int16_t *int_input_call_back(int a){ return int_input[a]; }
-u_int16_t *int_output_call_back(int a){ return int_output[a]; }
-u_int32_t *dint_input_call_back(int a){ return dint_input[a]; }
-u_int32_t *dint_output_call_back(int a){ return dint_output[a]; }
-u_int64_t *lint_input_call_back(int a){ return lint_input[a]; }
-u_int64_t *lint_output_call_back(int a){ return lint_output[a]; }
+uint8_t *bool_input_call_back(int a, int b){ return bool_input[a][b]; }
+uint8_t *bool_output_call_back(int a, int b){ return bool_output[a][b]; }
+uint8_t *byte_input_call_back(int a){ return byte_input[a]; }
+uint8_t *byte_output_call_back(int a){ return byte_output[a]; }
+uint16_t *int_input_call_back(int a){ return int_input[a]; }
+uint16_t *int_output_call_back(int a){ return int_output[a]; }
+uint32_t *dint_input_call_back(int a){ return dint_input[a]; }
+uint32_t *dint_output_call_back(int a){ return dint_output[a]; }
+uint64_t *lint_input_call_back(int a){ return lint_input[a]; }
+uint64_t *lint_output_call_back(int a){ return lint_output[a]; }
 void logger_callback(char *msg){ log(msg);}
 
 int main(int argc,char **argv)