1 files changed, 2 insertions, 0 deletions
diff --git a/awk.h b/awk.h
index 5e1e40a1..d413274c 100644
--- a/awk.h
+++ b/awk.h
@@ -63,9 +63,11 @@
 #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
 
 #include <stdarg.h>
 #include <stdbool.h>