diff --git a/CMakeLists.txt b/CMakeLists.txt
index 79ec75ad..9153ded8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@ set(CMAKE_TOOLCHAIN_FILE ${CMAKE_CURRENT_LIST_DIR}/firmware/toolchain-arm-cortex
 project(portapack-h1)
 
 set(VERSION "$ENV{VERSION_STRING}")
-if ("$ENV{EnvironmentVariableName}" STREQUAL "")
+if ("$ENV{VERSION_STRING}" STREQUAL "")
 	execute_process(
 		COMMAND git log -n 1 --format=%h
 		WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}