diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8921365d7b..0c752f518f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -945,16 +945,17 @@ else()
 endif()
 set (DATAFILE_DIR ${_datafile_dir} CACHE INTERNAL "Build time data file location.")
 
-if(ENABLE_EXTCAP)
-	set(HAVE_EXTCAP 1)
-	set(EXTCAP_DIR "${DATAFILE_DIR}/extcap/")
-endif()
-
 if(IS_ABSOLUTE ${CMAKE_INSTALL_LIBDIR})
   set(ABSOLUTE_CMAKE_INSTALL_LIBDIR "${CMAKE_INSTALL_LIBDIR}")
 else()
   set(ABSOLUTE_CMAKE_INSTALL_LIBDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 endif()
+
+if(ENABLE_EXTCAP)
+	set(HAVE_EXTCAP 1)
+	set(EXTCAP_DIR "${ABSOLUTE_CMAKE_INSTALL_LIBDIR}/${CPACK_PACKAGE_NAME}/extcap/")
+endif()
+
 # Location of our plugins. PLUGIN_DIRECTORY should allow running
 # from the build directory similar to DATAFILE_DIR above.
 if(ENABLE_PLUGINS)
diff --git a/cmakeconfig.h.in b/cmakeconfig.h.in
index 8b7e99e605..e90f512449 100644
--- a/cmakeconfig.h.in
+++ b/cmakeconfig.h.in
@@ -23,7 +23,7 @@
 #cmakedefine HAVE_SSE4_2 1
 
 /* Directory where extcap hooks reside */
-#define EXTCAP_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_DATADIR}/${CPACK_PACKAGE_NAME}/extcap/"
+#define EXTCAP_DIR "${EXTCAP_DIR}"
 
 /* Define to 1 if we want to enable extcap */
 #cmakedefine HAVE_EXTCAP 1