diff --git a/modules/ECMGeneratePkgConfigFile.cmake b/modules/ECMGeneratePkgConfigFile.cmake
--- a/modules/ECMGeneratePkgConfigFile.cmake
+++ b/modules/ECMGeneratePkgConfigFile.cmake
@@ -169,7 +169,11 @@
   )
 
   if(EGPF_INSTALL)
-    set(ECM_PKGCONFIG_INSTALL_DIR "${EGPF_LIB_INSTALL_DIR}/pkgconfig" CACHE PATH "The directory where pkgconfig will be installed to.")
+    if (NOT CMAKE_SYSTEM_NAME matches "FreeBSD")
+      set(ECM_PKGCONFIG_INSTALL_DIR "${EGPF_LIB_INSTALL_DIR}/pkgconfig" CACHE PATH "The directory where pkgconfig will be installed to.")
+    else()
+      set(ECM_PKGCONFIG_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/libdata/pkgconfig" CACHE PATH "The directory where pkgconfig will be installed to.")
+    endif()
     install(FILES ${PKGCONFIG_FILENAME} DESTINATION ${ECM_PKGCONFIG_INSTALL_DIR})
   endif()
 endfunction()