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-rw-r--r--src/nvim/fileio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/fileio.c b/src/nvim/fileio.c
index 841320245b..55ead4ae08 100644
--- a/src/nvim/fileio.c
+++ b/src/nvim/fileio.c
@@ -5635,7 +5635,7 @@ char *file_pat_to_reg_pat(const char *pat, const char *pat_end, char *allow_dirs
// "\*" to "\\.*" e.g., "dir\*.c"
// "\?" to "\\." e.g., "dir\??.c"
// "\+" to "\+" e.g., "fileX\+.c"
- if ((vim_isfilec(p[1]) || p[1] == '*' || p[1] == '?')
+ if ((vim_isfilec((uint8_t)p[1]) || p[1] == '*' || p[1] == '?')
&& p[1] != '+') {
reg_pat[i++] = '[';
reg_pat[i++] = '\\';