diff --git a/ChangeLog b/ChangeLog
index b8609f84..c1ab073c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2024-08-17  Araki Ken  <arakiken@users.sf.net>
+
+	* configure.in, tool/mlconfig/Makefile.in: Set X_LIBS_FOR_MLCONFIG
+	  if the version of gtk+ is 2.x to build gtkxlfdsel.c.
+
 2024-08-16  Araki Ken  <arakiken@users.sf.net>
 
 	* Merge https://github.com/arakiken/mlterm/issues/107
diff --git a/configure b/configure
index 7f2aaa6b..b6ac7d6c 100755
--- a/configure
+++ b/configure
@@ -704,6 +704,7 @@ LIBPNG_CFLAGS
 PERL
 GTK_LIBS_FOR_MLCONFIG
 GTK_CFLAGS_FOR_MLCONFIG
+X_LIBS_FOR_MLCONFIG
 MKINSTALLDIRS
 POSUB
 POFILES
@@ -21622,11 +21623,16 @@ $as_echo "$LINGUAS" >&6; }
 				GTK_CFLAGS_FOR_MLCONFIG=$GTK4_CFLAGS
 				GTK_LIBS_FOR_MLCONFIG=$GTK4_LIBS
 			else
+				if test "$gtk_version" = "2.0"; then
+					# for gtkxlfdsel.c
+					X_LIBS_FOR_MLCONFIG=$X_LIBS
+				fi
 				GTK_CFLAGS_FOR_MLCONFIG=$GTK_CFLAGS
 				GTK_LIBS_FOR_MLCONFIG=$GTK_LIBS
 			fi
 
 
+
 		else
 			echo ""
 			echo "** WARNING  **"
diff --git a/configure.in b/configure.in
index 086876cc..454fb7cb 100644
--- a/configure.in
+++ b/configure.in
@@ -1132,9 +1132,14 @@ mlconfig)
 				GTK_CFLAGS_FOR_MLCONFIG=$GTK4_CFLAGS
 				GTK_LIBS_FOR_MLCONFIG=$GTK4_LIBS
 			else
+				if test "$gtk_version" = "2.0"; then
+					# for gtkxlfdsel.c
+					X_LIBS_FOR_MLCONFIG=$X_LIBS
+				fi
 				GTK_CFLAGS_FOR_MLCONFIG=$GTK_CFLAGS
 				GTK_LIBS_FOR_MLCONFIG=$GTK_LIBS
 			fi
+			AC_SUBST(X_LIBS_FOR_MLCONFIG)
 			AC_SUBST(GTK_CFLAGS_FOR_MLCONFIG)
 			AC_SUBST(GTK_LIBS_FOR_MLCONFIG)
 		else
diff --git a/tool/mlconfig/Makefile.in b/tool/mlconfig/Makefile.in
index 95a01ec9..7e49dbc8 100644
--- a/tool/mlconfig/Makefile.in
+++ b/tool/mlconfig/Makefile.in
@@ -33,11 +33,11 @@ CFLAGS = $(CFLAGS_LOCAL) @GTK_CFLAGS_FOR_MLCONFIG@ @IMAGELIB_CFLAGS@ @DEB_CFLAGS
 LIBS1 = $(LIBS_LOCAL) @INTL_LIBS@ @DL_SELF@ @DL_LIBS_IM@ @GTK_LIBS_FOR_MLCONFIG@
 
 # -lX11 is for http://fedoraproject.org/wiki/Features/ChangeInImplicitDSOLinking
-LIBS2_xlib = $(LPOBL) @X_LIBS@
+LIBS2_xlib = $(LPOBL) @X_LIBS_FOR_MLCONFIG@
 
-LIBS2_wayland = $(LPOBL)
+LIBS2_wayland = $(LPOBL) @X_LIBS_FOR_MLCONFIG@
 
-LIBS2_sdl2 = $(LPOBL)
+LIBS2_sdl2 = $(LPOBL) @X_LIBS_FOR_MLCONFIG@
 
 # mlconfig is statically linked with libpobl.
 # Then it works if installed libpobl.dll is compiled with USE_WIN32API or not.