diff --git a/schedtop.c b/schedtop.c
index c0e0141..1cdcfaa 100644
--- a/schedtop.c
+++ b/schedtop.c
@@ -11,6 +11,9 @@
 #include <signal.h>
 
 #include <pwd.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <unistd.h>
 
 struct thread_info {
     int pid;
@@ -108,7 +111,7 @@
         sprintf(line, "/proc/%d/schedstat", pid);
     if (read_line(line, sizeof(line)))
         return;
-    if(sscanf(line, "%llu %llu %u", &info->exec_time, &info->delay_time, &info->run_count) != 3)
+    if(sscanf(line,  SCNu64 " " SCNu64 " " SCNu32, &info->exec_time, &info->delay_time, &info->run_count) != 3)
         return;
     if (proc_info) {
         proc_info->exec_time += info->exec_time;
@@ -210,7 +213,7 @@
     }
     if (!(flags & FLAG_BATCH))
         printf("\e[H\e[0J");
-    printf("Processes: %d, Threads %d\n", processes.active, threads.active);
+    printf("Processes: %zd, Threads %zd\n", processes.active, threads.active);
     switch (time_dp) {
     case 3:
         printf("   TID --- SINCE LAST ---- ---------- TOTAL ----------\n");
@@ -332,4 +335,3 @@
     closedir(d);
     return 0;
 }
-