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-rw-r--r--stdio-common/snprintf.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/stdio-common/snprintf.c b/stdio-common/snprintf.c
index a7a6e722ee..ca0b60aed6 100644
--- a/stdio-common/snprintf.c
+++ b/stdio-common/snprintf.c
@@ -20,6 +20,7 @@ Cambridge, MA 02139, USA.  */
 #include <stdio.h>
 
 #ifdef USE_IN_LIBIO
+# include <libioP.h>
 # define __vsnprintf _IO_vsnprintf
 #endif