diff --git a/win64/Toolchain-mingw64.cmake b/win64/Toolchain-mingw64.cmake
index d7db4d3c12dd85578bf4c39628af1906a6fe90f2..3699f4136034d341925761b54311829cded4f6ca 100644
--- a/win64/Toolchain-mingw64.cmake
+++ b/win64/Toolchain-mingw64.cmake
@@ -22,6 +22,7 @@ set (QUAZIP_INCLUDE_DIR "/home/polipo/devel/quazip-0.7.3")
 set (QUAZIP_QT5_LIBRARIES "/home/polipo/devel/quazip-0.7.3/quazip/release/quazip.dll")
 # QUAZIP_ZLIB_INCLUDE_DIR    - The include dir of zlib headers
 
+set (QCustomPlot_FOUND 1)
 set (QCustomPlot_INCLUDES "/home/polipo/devel/qcustomplot-1.3.2+dfsg1")
 set (QCustomPlot_LIBRARIES "/home/polipo/devel/qcustomplot-1.3.2+dfsg1/build/libqcustomplot.dll")