diff --git a/project_generator/templates/cmakelistgccarm.tmpl b/project_generator/templates/cmakelistgccarm.tmpl
index 74075713..5873897f 100644
--- a/project_generator/templates/cmakelistgccarm.tmpl
+++ b/project_generator/templates/cmakelistgccarm.tmpl
@@ -25,6 +25,9 @@ set(CMAKE_SYSTEM_PROCESSOR {{core}})
 find_program(ARM_NONE_EABI_GCC arm-none-eabi-gcc)
 find_program(ARM_NONE_EABI_GPP arm-none-eabi-g++)
 find_program(ARM_NONE_EABI_OBJCOPY arm-none-eabi-objcopy)
+if (ARM_NONE_EABI_GCC-NOTFOUND OR ARM_NONE_EABI_GPP-NOTFOUND OR ARM_NONE_EABI_OBJCOPY-NOTFOUND)
+    MESSAGE(FATAL_ERRORO "Could not find the arm-none-eabi gnu toolchain")
+endif()
 
 cmake_force_c_compiler("${ARM_NONE_EABI_GCC}" GNU)
 cmake_force_cxx_compiler("${ARM_NONE_EABI_GPP}" GNU)