1 files changed, 4 insertions, 0 deletions
diff --git a/vsprintf.c b/vsprintf.c
index 92fe1a7..0125e72 100644
--- a/vsprintf.c
+++ b/vsprintf.c
@@ -16,6 +16,10 @@
 #include <stdarg.h>
 #include <limits.h>
 
+#ifndef HAVE_FPUTS_UNLOCKED
+# define fputs_unlocked fputs
+#endif
+
 #define noinline_for_stack /*nothing*/
 #define likely(expr)       (expr)
 #define unlikely(expr)     (expr)