diff --git a/ChangeLog b/ChangeLog
index 930ed0426..364eaae95 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2015-08-15  Moritz Bunkus  <moritz@bunkus.org>
 
+        * build system: bug fix: fixed Qt platform plugin detection on
+        MacOS.
+
         * Released v8.3.0.
 
         * MKVToolNix GUI: chapter editor enhancement: pressing return will
diff --git a/ac/qt5.m4 b/ac/qt5.m4
index c8134a861..d96c901d0 100644
--- a/ac/qt5.m4
+++ b/ac/qt5.m4
@@ -201,8 +201,8 @@ return 0;
 
     if test x"$wanted_plugin" != x; then
       plugins_dir=
-      for dir in `echo $QT_LIBS | sed -e 's/-l[^ ]*\( \|$\)//g' -e 's/-L//g'` ; do
-        if test -f "$dir/../plugins/platforms/libq${wanted_plugin}.a" ; then
+      for dir in `echo " $QT_LIBS " | sed -e 's/ -l[^ ]*//g' -e 's/-L//g'` ; do
+        if test -f "$dir/../plugins/platforms/libq${wanted_plugin}.a"; then
           plugins_dir="$dir/../plugins"
           break
         fi