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-rw-r--r--lib/libalpm/be_package.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/libalpm/be_package.c b/lib/libalpm/be_package.c
index 1cd30c28..c1a43438 100644
--- a/lib/libalpm/be_package.c
+++ b/lib/libalpm/be_package.c
@@ -82,7 +82,7 @@ static int parse_descfile(struct archive *a, pmpkg_t *newpkg)
} else if(!strcmp(key, "license")) {
newpkg->licenses = alpm_list_add(newpkg->licenses, strdup(ptr));
} else if(!strcmp(key, "builddate")) {
- char first = tolower(ptr[0]);
+ char first = tolower((unsigned char)ptr[0]);
if(first > 'a' && first < 'z') {
struct tm tmp_tm = {0}; /* initialize to null in case of failure */
setlocale(LC_TIME, "C");