diff --git a/configure.ac b/configure.ac
index fa1329a3..0d03d2f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,9 +27,10 @@ TORRENT_WITHOUT_NCURSESW()
 TORRENT_WITHOUT_STATVFS()
 TORRENT_WITHOUT_STATFS()
 
-ACX_PTHREAD(CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS";
-            LIBS="$PTHREAD_LIBS $LIBS"
-)
+ACX_PTHREAD()
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
+LIBS="$PTHREAD_LIBS $LIBS"
 
 PKG_CHECK_MODULES(sigc, sigc++-2.0,
 	          CXXFLAGS="$CXXFLAGS $sigc_CFLAGS";