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-rw-r--r--src/internal/stdio_impl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/internal/stdio_impl.h b/src/internal/stdio_impl.h
index ab34da2a..44497344 100644
--- a/src/internal/stdio_impl.h
+++ b/src/internal/stdio_impl.h
@@ -105,7 +105,7 @@ hidden void __getopt_msg(const char *, const char *, const char *, size_t);
 	( ((f)->rpos != (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
 
 #define putc_unlocked(c, f) \
-	( ((unsigned char)(c)!=(f)->lbf && (f)->wpos!=(f)->wend) \
+	( (((unsigned char)(c)!=(f)->lbf && (f)->wpos!=(f)->wend)) \
 	? *(f)->wpos++ = (c) : __overflow((f),(c)) )
 
 /* Caller-allocated FILE * operations */