diff --git a/map65/libm65/CMakeLists.txt b/map65/libm65/CMakeLists.txt
index 238180322..fe5ee170c 100644
--- a/map65/libm65/CMakeLists.txt
+++ b/map65/libm65/CMakeLists.txt
@@ -136,8 +136,8 @@ target_link_libraries (m65 m65impl ${FFTW3_LIBRARIES})
 add_executable (mapsim mapsim.f90)
 target_link_libraries (mapsim m65impl ${FFTW3_LIBRARIES})
 
-add_executable (synctest synctest.f90)
-target_link_libraries (synctest m65impl ${FFTW3_LIBRARIES})
+#add_executable (synctest synctest.f90)
+#target_link_libraries (synctest m65impl ${FFTW3_LIBRARIES})
 
 if (WIN32)
   install (