diff --git a/m4/qbittorrent.m4 b/m4/qbittorrent.m4
index 7fbf482d5..cba94d629 100644
--- a/m4/qbittorrent.m4
+++ b/m4/qbittorrent.m4
@@ -12,9 +12,9 @@ AC_DEFUN([FIND_QT4],
                                 [QT_QMAKE=`AS_DIRNAME(["$QT_QMAKE"])`])
                  ])
 
-AS_IF([$QT_QMAKE/qmake],
+AS_IF([test -f "$QT_QMAKE/qmake"],
               [QT_QMAKE="$QT_QMAKE/qmake"],
-              [AS_IF([$QT_QMAKE/qmake-qt4],
+              [AS_IF([test -f "$QT_QMAKE/qmake-qt4"],
                              [QT_QMAKE="$QT_QMAKE/qmake-qt4"],
                              [QT_QMAKE=""])
               ])
@@ -38,7 +38,7 @@ AC_DEFUN([FIND_QT5],
 
 AS_IF([test -f "$QT_QMAKE/qmake"],
               [QT_QMAKE="$QT_QMAKE/qmake"],
-              [AS_IF([test -f "$QT_QMAKE/qmake-qt5"]
+              [AS_IF([test -f "$QT_QMAKE/qmake-qt5"],
                              [QT_QMAKE="$QT_QMAKE/qmake-qt5"],
                              [QT_QMAKE=""])
               ])