diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bd2dae9..ccf5f3ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,6 +16,9 @@ set(PIP_BUILD 1)
 include(CheckFunctionExists)
 include(DeployMacros)
 include(PIPMacros)
+if(NOT DEFINED BUILD_NUMBER)
+	set(BUILD_NUMBER 9999)
+endif()
 
 set(_ICU_DEFAULT OFF)
 if((NOT DEFINED WIN32) AND (NOT DEFINED ANDROID_PLATFORM) AND (NOT DEFINED APPLE))
@@ -98,7 +101,13 @@ endif()
 
 
 # Version
-set_version(pip MAJOR "${_PIP_MAJOR}" MINOR "${_PIP_MINOR}" REVISION "${_PIP_REVISION}" SUFFIX "${_PIP_SUFFIX}" OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/${PIP_SRC_MAIN}/piversion.h")
+set_version(pip
+ MAJOR "${_PIP_MAJOR}"
+ MINOR "${_PIP_MINOR}"
+ REVISION "${_PIP_REVISION}"
+ BUILD "${BUILD_NUMBER}"
+ SUFFIX "${_PIP_SUFFIX}"
+ OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/${PIP_SRC_MAIN}/piversion.h")
 set_deploy_property(pip ${PIP_LIB_TYPE}
 	LABEL "PIP main library"
 	FULLNAME "${_PIP_DOMAIN}.pip"