diff --git a/CMakeLists.txt b/CMakeLists.txt
index 45564fa212..405abc5e32 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,36 @@ add_definitions(-DORCT2_RESOURCE_DIR="${ORCT2_RESOURCE_DIR}")
 add_definitions(-DHAVE_CONFIG_H)
 add_definitions(-DCURL_STATICLIB)
 
+# Define current git branch.
+execute_process(
+	COMMAND git rev-parse --abbrev-ref HEAD
+	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+	OUTPUT_VARIABLE OPENRCT2_BRANCH
+	OUTPUT_STRIP_TRAILING_WHITESPACE
+	ERROR_QUIET
+)
+add_definitions(-DOPENRCT2_BRANCH="${OPENRCT2_BRANCH}")
+
+# Define commit hash.
+execute_process(
+	COMMAND git rev-parse HEAD
+	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+	OUTPUT_VARIABLE OPENRCT2_COMMIT_SHA1
+	OUTPUT_STRIP_TRAILING_WHITESPACE
+	ERROR_QUIET
+)
+add_definitions(-DOPENRCT2_COMMIT_SHA1="${OPENRCT2_COMMIT_SHA1}")
+
+# Define short commit hash.
+execute_process(
+	COMMAND git rev-parse --short HEAD
+	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+	OUTPUT_VARIABLE OPENRCT2_COMMIT_SHA1_SHORT
+	OUTPUT_STRIP_TRAILING_WHITESPACE
+	ERROR_QUIET
+)
+add_definitions(-DOPENRCT2_COMMIT_SHA1_SHORT="${OPENRCT2_COMMIT_SHA1_SHORT}")
+
 INCLUDE(FindPkgConfig)
 
 # Options