diff --git a/ChangeLog b/ChangeLog
index 7b497826ae..45b43f9504 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Aug  7 09:47:06 2010  Masaki Suketa <masaki.suketa@nifty.ne.jp>
+
+	* ext/win32ole/win32ole.c: fix checking version of GCC.
+
 Sat Aug  7 09:31:48 2010  Tanaka Akira  <akr@fsij.org>
 
 	* ext/pathname/pathname.c (Init_pathname): fix number of arguments for
diff --git a/ext/win32ole/win32ole.c b/ext/win32ole/win32ole.c
index a6db6a03b2..70deed3748 100644
--- a/ext/win32ole/win32ole.c
+++ b/ext/win32ole/win32ole.c
@@ -19,7 +19,12 @@
 #include "ruby/st.h"
 #include "ruby/encoding.h"
 
-#if (defined(__GNUC__)) && (__GNUC__ <= 3) && (__GNUC_MINOR__ <= 4) && (__GNUC_PATCHLEVEL__ <= 4)
+#define GNUC_OLDER_3_4_4 \
+    ((__GNUC__ < 3) || \
+     ((__GNUC__ <= 3) && (__GNUC_MINOR__ < 4)) || \
+     ((__GNUC__ <= 3) && (__GNUC_MINOR__ <= 4) && (__GNUC_PATCHLEVEL__ <= 4)))
+
+#if (defined(__GNUC__)) && (GNUC_OLDER_3_4_4) 
 #ifndef NONAMELESSUNION
 #define NONAMELESSUNION 1
 #endif
@@ -51,13 +56,13 @@
 #define DOUTI(x) fprintf(stderr, "[%ld]:" #x "=%d\n",__LINE__,x)
 #define DOUTD(x) fprintf(stderr, "[%d]:" #x "=%f\n",__LINE__,x)
 
-#if (defined(__GNUC__)) && (__GNUC__ <= 3) && (__GNUC_MINOR__ <= 4) && (__GNUC_PATCHLEVEL__ <= 4)
+#if (defined(__GNUC__)) && (GNUC_OLDER_3_4_4) 
 #define V_UNION1(X, Y) ((X)->u.Y)
 #else
 #define V_UNION1(X, Y) ((X)->Y)
 #endif
 
-#if (defined(__GNUC__)) && (__GNUC__ <= 3) && (__GNUC_MINOR__ <= 4) && (__GNUC_PATCHLEVEL__ <= 4)
+#if (defined(__GNUC__)) && (GNUC_OLDER_3_4_4) 
 #undef V_UNION
 #define V_UNION(X,Y) ((X)->n1.n2.n3.Y)