diff --git a/libgrive/CMakeLists.txt b/libgrive/CMakeLists.txt
index 852be17..2af85e3 100644
--- a/libgrive/CMakeLists.txt
+++ b/libgrive/CMakeLists.txt
@@ -59,7 +59,7 @@ set_target_properties(grive PROPERTIES
 set ( LIBGRIVE_INSTALL_DIR lib)
 if (EXISTS "${CMAKE_INSTALL_PREFIX}/lib32/" AND CMAKE_SIZEOF_VOID_P EQUAL 4)
 	set (LIBGRIVE_INSTALL_DIR lib32)
-else if (EXISTS "${CMAKE_INSTALL_PREFIX}/lib64/" AND CMAKE_SIZEOF_VOID_P EQUAL 8)
+elsif (EXISTS "${CMAKE_INSTALL_PREFIX}/lib64/" AND CMAKE_SIZEOF_VOID_P EQUAL 8)
 	set (LIBGRIVE_INSTALL_DIR lib64)
 endif ()