1 files changed, 1 insertions, 0 deletions
diff --git a/htop.h b/htop.h
index 33745eb5..139019e0 100644
--- a/htop.h
+++ b/htop.h
@@ -15,6 +15,7 @@ in the source distribution for its full text.
 #include <sys/param.h>
 #include <ctype.h>
 #include <stdbool.h>
+#include <locale.h>
 
 #include "ProcessList.h"
 #include "CRT.h"