diff --git a/ext/-test-/namespace/yay1/yay1.def b/ext/-test-/namespace/yay1/yay1.def
index edbae87312..510fbe7017 100644
--- a/ext/-test-/namespace/yay1/yay1.def
+++ b/ext/-test-/namespace/yay1/yay1.def
@@ -1,4 +1,3 @@
-LIBRARY yay1
 EXPORTS
   Init_yay1
   yay_value
diff --git a/ext/-test-/namespace/yay1/yay1.h b/ext/-test-/namespace/yay1/yay1.h
index d68f8b5523..c4dade928a 100644
--- a/ext/-test-/namespace/yay1/yay1.h
+++ b/ext/-test-/namespace/yay1/yay1.h
@@ -1,4 +1,4 @@
 #include <ruby.h>
 #include "ruby/internal/dllexport.h"
 
-RUBY_EXTERN VALUE yay_value(void);
+RUBY_FUNC_EXPORTED VALUE yay_value(void);
diff --git a/ext/-test-/namespace/yay2/yay2.def b/ext/-test-/namespace/yay2/yay2.def
index 6bb6011f4b..163fc44c04 100644
--- a/ext/-test-/namespace/yay2/yay2.def
+++ b/ext/-test-/namespace/yay2/yay2.def
@@ -1,4 +1,3 @@
-LIBRARY yay2
 EXPORTS
   Init_yay2
   yay_value
diff --git a/ext/-test-/namespace/yay2/yay2.h b/ext/-test-/namespace/yay2/yay2.h
index d68f8b5523..c4dade928a 100644
--- a/ext/-test-/namespace/yay2/yay2.h
+++ b/ext/-test-/namespace/yay2/yay2.h
@@ -1,4 +1,4 @@
 #include <ruby.h>
 #include "ruby/internal/dllexport.h"
 
-RUBY_EXTERN VALUE yay_value(void);
+RUBY_FUNC_EXPORTED VALUE yay_value(void);