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-rw-r--r--git-compat-util.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index 5bd9ad7d2a..80767ff3a1 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -470,7 +470,7 @@ extern const char tolower_trans_tbl[256];
#undef isupper
#undef tolower
#undef toupper
-extern unsigned char sane_ctype[256];
+extern const unsigned char sane_ctype[256];
#define GIT_SPACE 0x01
#define GIT_DIGIT 0x02
#define GIT_ALPHA 0x04