1 files changed, 6 insertions, 0 deletions
diff --git a/x2p/a2p.h b/x2p/a2p.h
index 657e1bd18e..4de5dbb830 100644
--- a/x2p/a2p.h
+++ b/x2p/a2p.h
@@ -19,12 +19,18 @@
 #if defined(STANDARD_C) && defined(I_STDLIB)
 #   include <stdlib.h>
 #endif /* STANDARD_C */
+
 #include <stdio.h>
 
 #ifdef I_MATH
 #include <math.h>
 #endif
 
+#ifdef I_SYS_TYPES
+#  include <sys/types.h>
+#endif
+
+
 #ifdef USE_NEXT_CTYPE 
 #include <appkit/NXCType.h>
 #else