diff --git a/auxdir/x_ac_gtk.m4 b/auxdir/x_ac_gtk.m4
index 758cddf64904494e8c20c4e71f7741de8a95ed0b..57cf85ce7cc0ba666ff1b268a7687b52fb1bb321 100644
--- a/auxdir/x_ac_gtk.m4
+++ b/auxdir/x_ac_gtk.m4
@@ -18,6 +18,7 @@ AC_DEFUN([X_AC_GTK],
     ac_have_gtk="yes"
     _x_ac_pkcfg_bin="no"
 
+    # use the correct libs if running on 64bit
     if test -d "/usr/lib64/pkgconfig"; then
 	    PKG_CONFIG_PATH="/usr/lib64/pkgconfig/"
     fi
diff --git a/configure b/configure
index e4dc90a42b604b97f5621605f99a7225b313ccc9..97d7c13290b8b4080d8e14dcd414eb191187866c 100755
--- a/configure
+++ b/configure
@@ -25593,6 +25593,12 @@ fi
     ac_have_gtk="yes"
     _x_ac_pkcfg_bin="no"
 
+    # use the correct libs if running on 64bit
+    if test -d "/usr/lib64/pkgconfig"; then
+	    PKG_CONFIG_PATH="/usr/lib64/pkgconfig/"
+    fi
+
+
 ### Check for pkg-config program
 
 # Check whether --with-pkg-config was given.