2 files changed, 3 insertions, 2 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 7f53bb4b97..74b42289b1 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -657,7 +657,8 @@ MSG
   end
 
   def try_ldflags(flags, opts = {})
-    try_link(MAIN_DOES_NOTHING, flags, {:werror => true}.update(opts))
+    opts = {:werror => true}.update(opts) if $mswin
+    try_link(MAIN_DOES_NOTHING, flags, opts)
   end
 
   def append_ldflags(flags, *opts)
diff --git a/version.h b/version.h
index ef4ef1e076..36c819717e 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.5.2"
 #define RUBY_RELEASE_DATE "2018-10-09"
-#define RUBY_PATCHLEVEL 92
+#define RUBY_PATCHLEVEL 93
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 10