Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -29,7 +29,7 @@
 set(QT_REQUIRED_VERSION "5.11.0")
 
 set(KCALENDARCORE_LIB_VERSION ${KF5_VERSION})
-ecm_setup_version(PROJECT VARIABLE_PREFIX KCALCORE
+ecm_setup_version(PROJECT VARIABLE_PREFIX KCALENDARCORE
   VERSION_HEADER "${KCalendarCore_BINARY_DIR}/kcalendarcore_version.h"
   PACKAGE_VERSION_FILE "${KCalendarCore_BINARY_DIR}/KF5CalendarCoreConfigVersion.cmake"
   SOVERSION 5
@@ -89,9 +89,12 @@
   DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5} COMPONENT Devel
 )
 if (NOT KCALENDARCORE_NO_DEPRECATED_NAMESPACE)
+  ecm_setup_version(PROJECT VARIABLE_PREFIX KCALCORE
+    VERSION_HEADER "${KCalendarCore_BINARY_DIR}/kcalcore_version.h"
+  )
   install(FILES
-    ${CMAKE_CURRENT_BINARY_DIR}/kcalendarcore_version.h
-    DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5} COMPONENT Devel RENAME kcalcore_version.h
+    ${CMAKE_CURRENT_BINARY_DIR}/kcalcore_version.h
+    DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5} COMPONENT Devel
   )
 endif()