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-rw-r--r--Build/source/texk/dvipsk/afm2tfm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Build/source/texk/dvipsk/afm2tfm.c b/Build/source/texk/dvipsk/afm2tfm.c
index ec6b219b7d6..e57417b5a09 100644
--- a/Build/source/texk/dvipsk/afm2tfm.c
+++ b/Build/source/texk/dvipsk/afm2tfm.c
@@ -826,7 +826,7 @@ upmap(void) { /* Compute uppercase mapping, when making a small caps font */
Looks like we should use isupper to me --karl. */
for (Ai=adobechars; Ai; Ai=Ai->next) {
p = Ai->adobename;
- if (isupper (*p)) {
+ if (isupper ((unsigned char)*p)) {
q = lwr;
for (; *p; p++)
*q++ = TOLOWER (*p);