diff --git a/library/stdlib_program_name.c b/library/stdlib_program_name.c
index 03eefc0..ffdf674 100644
--- a/library/stdlib_program_name.c
+++ b/library/stdlib_program_name.c
@@ -49,6 +49,12 @@
 
 /****************************************************************************/
 
+#if defined(__amigaos4__)
+#include <dos/obsolete.h>
+#endif /* __amigaos4__ */
+
+/****************************************************************************/
+
 #ifdef __amigaos4__
 #define MEMORY_TYPE MEMF_PRIVATE
 #else