diff --git a/cmake/Q7SCrossCompileConfig.cmake b/cmake/Q7SCrossCompileConfig.cmake
index 1d23b16d..57f59cbd 100644
--- a/cmake/Q7SCrossCompileConfig.cmake
+++ b/cmake/Q7SCrossCompileConfig.cmake
@@ -1,5 +1,5 @@
 # CROSS_COMPILE also needs to be set accordingly or passed to the CMake command
-if(NOT DEFINED ENV{Q7S_SYSROOT})
+if(NOT DEFINED ENV{Q7S_ROOTFS})
     # Sysroot has not been cached yet and was not set in environment either
     if(NOT DEFINED SYSROOT_PATH)
         message(FATAL_ERROR