diff --git a/ChangeLog b/ChangeLog
index 9bd3f953ca..0210e5e94a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jul 17 12:58:41 2006  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* configure.in: set ac_cv_func_dlopen=no on MinGW.
+
 Mon Jul 17 11:47:35 2006  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* st.c: still need to include config.h on some platforms.
diff --git a/configure.in b/configure.in
index cd8f64bc4a..82fa852dd4 100644
--- a/configure.in
+++ b/configure.in
@@ -378,6 +378,7 @@ mingw*)		LIBS="-lshell32 -lws2_32 $LIBS"
 		ac_cv_func_getpgrp_void=no
 		ac_cv_func_setpgrp_void=yes
 		ac_cv_func_memcmp_working=yes
+		ac_cv_func_dlopen=no
 		rb_cv_binary_elf=no
 		rb_cv_negative_time_t=no
 		enable_pthread=no