1 files changed, 2 insertions, 0 deletions
diff --git a/version.h b/version.h
index 1187802b71..50582a76a1 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,9 @@
 #define RUBY_RELEASE_MONTH 5
 #define RUBY_RELEASE_DAY 18
 
+#ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];
 RUBY_EXTERN const char ruby_release_date[];
 RUBY_EXTERN const char ruby_platform[];
 RUBY_EXTERN const int ruby_patchlevel;
+#endif