diff --git a/abduco.c b/abduco.c
index a2fe8be..b2c6dc3 100644
--- a/abduco.c
+++ b/abduco.c
@@ -54,7 +54,7 @@
 
 #if defined(_AIX)
 # include "forkpty-aix.c"
-#elif defined(__sun) || defined(__sun__)
+#elif defined(__sun)
 # include "forkpty-sunos.c"
 #endif