1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index 6d898dd6..d618181d 100644
--- a/io.c
+++ b/io.c
@@ -190,7 +190,7 @@
 #define setsid()	/* nothing */
 #endif /* HAVE_SETSID */
 
-#if defined(GAWK_AIX)
+#if defined(_AIX)
 #undef TANDEM	/* AIX defines this in one of its header files */
 #endif