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-rw-r--r--mkfontscale.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mkfontscale.c b/mkfontscale.c
index b538d79..5d9e3de 100644
--- a/mkfontscale.c
+++ b/mkfontscale.c
@@ -30,6 +30,7 @@
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
+#include <ctype.h>
#include <X11/Xos.h>
#include <X11/fonts/fontenc.h>