diff --git a/src/main.c b/src/main.c
index 59ca95d..f0291d5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,9 +2,11 @@
 #include <stdlib.h>
 #include <errno.h>
 
+#include "calibration.h"
+
 #define INPUT_FILE_PATH "./input.txt"
 
-int main(int argc, char *argv[]) {
+int main(void) {
     unsigned int calibration_sum;
     FILE *input_file;
 
@@ -16,5 +18,7 @@ int main(int argc, char *argv[]) {
 
     calibration_sum = get_calibration_sum(input_file);
 
+    printf("Calibration sum: %d\n", calibration_sum);
+
     return EXIT_SUCCESS;
 }