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-rw-r--r--stdio-common/tfformat.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/stdio-common/tfformat.c b/stdio-common/tfformat.c
index 41432b2a92..8e138a2ada 100644
--- a/stdio-common/tfformat.c
+++ b/stdio-common/tfformat.c
@@ -4023,7 +4023,8 @@ sprint_double_type sprint_doubles[] =
 int required_precision = 13;
 
 #if defined(__STDC__) || defined(__cplusplus)
-int matches(register char *result, register const char *desired)
+static int
+matches (register char *result, register const char *desired)
 #else
 int matches(result, desired)
      register char *result; register const char *desired;