diff --git a/src/main.c b/src/main.c
index 668c968..ba406fd 100644
--- a/src/main.c
+++ b/src/main.c
@@ -13,6 +13,7 @@
 #include <fcntl.h>
 #include <termios.h>
 #include <errno.h>
+#include <locale.h>
 
 const int digit_bitmaps[10][5][3] = {
         {{1,1,1},{1,0,1},{1,0,1},{1,0,1},{1,1,1}}, // 0
@@ -563,6 +564,8 @@ int main(int argc, char **argv) {
 
         Bat_state bat_state = {0, 1000, 0};
 
+        setlocale(LC_NUMERIC, "C");
+
         while ((option = getopt(argc, argv, "d:hfcur")) !=-1) {
                 switch (option) {
                         case 'd' :