diff --git a/CMakeLists.txt b/CMakeLists.txt
index b000426b..677bea6f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,7 @@ set(PROJECT_VERSION "5.19.90")
 set(PROJECT_VERSION_MAJOR 5)
 
 set(KF5_MIN_VERSION "5.74")
+set(QT_MIN_VERSION "5.15.0")
 
 include(GenerateExportHeader)
 include(WriteBasicConfigVersionFile)
diff --git a/kstyle/CMakeLists.txt b/kstyle/CMakeLists.txt
index b269cd18..0abe736b 100644
--- a/kstyle/CMakeLists.txt
+++ b/kstyle/CMakeLists.txt
@@ -1,5 +1,5 @@
 ################# Qt/KDE #################
-find_package(Qt5 REQUIRED CONFIG COMPONENTS Widgets DBus)
+find_package(Qt5 ${QT_MIN_VERSION} REQUIRED CONFIG COMPONENTS Widgets DBus)
 find_package(KF5 REQUIRED COMPONENTS
     I18n
     Config