diff --git a/src/openrct2/CMakeLists.txt b/src/openrct2/CMakeLists.txt
index aff74307f9..25c02d64a2 100644
--- a/src/openrct2/CMakeLists.txt
+++ b/src/openrct2/CMakeLists.txt
@@ -207,17 +207,19 @@ include_directories(${PROJECT_NAME} SYSTEM ${CMAKE_CURRENT_LIST_DIR}/../thirdpar
 # To avoid unnecessary rebuilds set the current branch and
 # short sha1 only for the two files that use these
 # definitions: Version.cpp and Crash/Platform.cpp
-set_property(SOURCE ${CMAKE_CURRENT_LIST_DIR}/Version.cpp ${CMAKE_CURRENT_LIST_DIR}/Crash/Platform.cpp
-    PROPERTY COMPILE_DEFINITIONS
-    OPENRCT2_VERSION_TAG="${OPENRCT2_VERSION_TAG}")
+if (NOT OPENRCT2_VERSION_TAG STREQUAL "")
+    set_property(SOURCE ${CMAKE_CURRENT_LIST_DIR}/Version.cpp ${CMAKE_CURRENT_LIST_DIR}/Crash/Platform.cpp
+        PROPERTY COMPILE_DEFINITIONS
+        OPENRCT2_VERSION_TAG="${OPENRCT2_VERSION_TAG}")
+endif()
 
-if (NOT OPENRCT2_BRANCH STREQUAL "master")
+if (NOT OPENRCT2_BRANCH STREQUAL "master" AND NOT OPENRCT2_BRANCH STREQUAL "")
     set_property(SOURCE ${CMAKE_CURRENT_LIST_DIR}/Version.cpp ${CMAKE_CURRENT_LIST_DIR}/Crash/Platform.cpp
         APPEND PROPERTY COMPILE_DEFINITIONS
         OPENRCT2_BRANCH="${OPENRCT2_BRANCH}")
 endif()
 
-if (NOT OPENRCT2_COMMIT_SHA1_SHORT STREQUAL "HEAD")
+if (NOT OPENRCT2_COMMIT_SHA1_SHORT STREQUAL "HEAD" AND NOT OPENRCT2_COMMIT_SHA1_SHORT STREQUAL "")
     set_property(SOURCE ${CMAKE_CURRENT_LIST_DIR}/Version.cpp ${CMAKE_CURRENT_LIST_DIR}/Crash/Platform.cpp
         APPEND PROPERTY COMPILE_DEFINITIONS
         OPENRCT2_COMMIT_SHA1_SHORT="${OPENRCT2_COMMIT_SHA1_SHORT}")