diff --git a/CMakeLists.txt b/CMakeLists.txt
index eaff48ee0160899b078579e0ac17c1a9cf5a6630..8e0480637b47a8ce06e495bd0013d0fdff999ef1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,6 +65,16 @@ find_package(KF5GrantleeTheme ${GRANTLEETHEME_LIB_VERSION} CONFIG REQUIRED)
 
 find_package(KF5Purpose ${KF5_MIN_VERSION} CONFIG REQUIRED)
 
+option(USE_UNIFY_CMAKE_SUPPORT "Use UNIFY cmake support (speedup compile time)" FALSE)
+
+set(COMPILE_WITH_CMAKE_SUPPORT false)
+if (USE_UNIFY_CMAKE_SUPPORT)
+    if(${CMAKE_VERSION} VERSION_LESS "3.16.0")
+        message(STATUS "CMAKE version is less than 3.16.0 . We can't use cmake unify build support")
+    else()
+        set(COMPILE_WITH_CMAKE_SUPPORT true)
+    endif()
+endif()
 
 option(BUILD_DESIGNERPLUGIN "Build plugin for Qt Designer" ON)
 add_feature_info(DESIGNERPLUGIN ${BUILD_DESIGNERPLUGIN} "Build plugin for Qt Designer")
diff --git a/src/pimcommon/CMakeLists.txt b/src/pimcommon/CMakeLists.txt
index f1d9bc1b533e1c2a1716b7bb67213ed5e5b03b23..f7620af45715d91575261228e28d3d0b3922c48d 100644
--- a/src/pimcommon/CMakeLists.txt
+++ b/src/pimcommon/CMakeLists.txt
@@ -165,6 +165,9 @@ kconfig_add_kcfg_files(libpimcommon_SRCS
     )
 
 add_library(KF5PimCommon ${libpimcommon_SRCS})
+if (COMPILE_WITH_CMAKE_SUPPORT)
+    set_target_properties(KF5PimCommon PROPERTIES UNITY_BUILD ON)
+endif()
 generate_export_header(KF5PimCommon BASE_NAME pimcommon)
 add_library(KF5::PimCommon ALIAS KF5PimCommon)
 
diff --git a/src/pimcommonakonadi/CMakeLists.txt b/src/pimcommonakonadi/CMakeLists.txt
index b5078cafb27683bf1780e2155da2c3570de6aebf..dc31a40da9aaf4b559b95aeaf5dd83c7c8dfa676 100644
--- a/src/pimcommonakonadi/CMakeLists.txt
+++ b/src/pimcommonakonadi/CMakeLists.txt
@@ -140,6 +140,10 @@ ecm_qt_declare_logging_category(libpimcommonakonadi_SRCS HEADER pimcommonakonadi
 
 
 add_library(KF5PimCommonAkonadi ${libpimcommonakonadi_SRCS})
+if (COMPILE_WITH_CMAKE_SUPPORT)
+    set_target_properties(KF5PimCommonAkonadi PROPERTIES UNITY_BUILD ON)
+endif()
+
 generate_export_header(KF5PimCommonAkonadi BASE_NAME pimcommonakonadi)
 add_library(KF5::PimCommonAkonadi ALIAS KF5PimCommonAkonadi)