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-rw-r--r--stdio-common/sprintf.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/stdio-common/sprintf.c b/stdio-common/sprintf.c
index 0a0259ef0c..eaa4318b9c 100644
--- a/stdio-common/sprintf.c
+++ b/stdio-common/sprintf.c
@@ -20,6 +20,7 @@
 #include <stdio.h>
 
 #ifdef USE_IN_LIBIO
+# include <libio/iolibio.h>
 # define vsprintf(s, f, a) _IO_vsprintf (s, f, a)
 #endif