diff --git a/cmake/aarch64-rpi3-linux-gnu.cmake b/cmake/aarch64-rpi3-linux-gnu.cmake
index 1852d8f..6f1f7c5 100644
--- a/cmake/aarch64-rpi3-linux-gnu.cmake
+++ b/cmake/aarch64-rpi3-linux-gnu.cmake
@@ -36,8 +36,7 @@ set(CMAKE_C_COMPILER_TARGET ${triple})
 set(CMAKE_CXX_COMPILER aarch64-rpi3-linux-gnu-c++)
 set(CMAKE_CXX_COMPILER_TARGET ${triple})
 
-#set(CMAKE_C_FLAGS "--sysroot ${SYSROOT}")
-#set(CMAKE_CXX_FLAGS "--sysroot ${SYSROOT}")
+set(CMAKE_SYSROOT ${SYSROOT})
 
 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
diff --git a/cmake/armv6-rpi-linux-gnueabihf.cmake b/cmake/armv6-rpi-linux-gnueabihf.cmake
index 780810d..9dedc16 100644
--- a/cmake/armv6-rpi-linux-gnueabihf.cmake
+++ b/cmake/armv6-rpi-linux-gnueabihf.cmake
@@ -36,8 +36,7 @@ set(CMAKE_C_COMPILER_TARGET ${triple})
 set(CMAKE_CXX_COMPILER armv6-rpi-linux-gnueabihf-c++)
 set(CMAKE_CXX_COMPILER_TARGET ${triple})
 
-#set(CMAKE_C_FLAGS "--sysroot ${SYSROOT}")
-#set(CMAKE_CXX_FLAGS "--sysroot ${SYSROOT}")
+set(CMAKE_SYSROOT ${SYSROOT})
 
 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
diff --git a/cmake/armv8-rpi3-linux-gnueabihf.cmake b/cmake/armv8-rpi3-linux-gnueabihf.cmake
index cd7d7eb..a731c44 100644
--- a/cmake/armv8-rpi3-linux-gnueabihf.cmake
+++ b/cmake/armv8-rpi3-linux-gnueabihf.cmake
@@ -36,8 +36,7 @@ set(CMAKE_C_COMPILER_TARGET ${triple})
 set(CMAKE_CXX_COMPILER armv8-rpi3-linux-gnueabihf-c++)
 set(CMAKE_CXX_COMPILER_TARGET ${triple})
 
-#set(CMAKE_C_FLAGS "--sysroot ${SYSROOT}")
-#set(CMAKE_CXX_FLAGS "--sysroot ${SYSROOT}")
+set(CMAKE_SYSROOT ${SYSROOT})
 
 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)