1 files changed, 2 insertions, 0 deletions
diff --git a/awk.h b/awk.h
index 1051036f..4de6cfc8 100644
--- a/awk.h
+++ b/awk.h
@@ -65,9 +65,11 @@
 #endif /* LOCALEDIR */
 #endif
 
+#if !defined(__SUNPRO_C)
 #if !defined(__STDC__) || __STDC__ < 1
 #error "gawk no longer supports non-C89 environments (no __STDC__ or __STDC__ < 1)"
 #endif
+#endif
 
 #if defined(HAVE_STDARG_H)
 #include <stdarg.h>