diff --git a/library/stdio_headers.h b/library/stdio_headers.h
index dfd1b29..f94061b 100644
--- a/library/stdio_headers.h
+++ b/library/stdio_headers.h
@@ -74,6 +74,12 @@
 
 /****************************************************************************/
 
+#if defined(__amigaos4__)
+#include <dos/obsolete.h>
+#endif /* __amigaos4__ */
+
+/****************************************************************************/
+
 #ifndef CLIB_ALIB_PROTOS_H
 #include <clib/alib_protos.h>
 #endif /* CLIB_ALIB_PROTOS_H */