diff --git a/CMakeLists.txt b/CMakeLists.txt
index 94f69fd9..2507a048 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -218,8 +218,8 @@ endif ()
 
 # Install targets.
 if (FMT_INSTALL)
-	set(FMT_LIB_DIR lib CACHE STRING
-	  "Installation directory for libraries, relative to ${CMAKE_INSTALL_PREFIX}.")
-	install(TARGETS cppformat DESTINATION ${FMT_LIB_DIR})
-	install(FILES format.h DESTINATION include/cppformat)
+  set(FMT_LIB_DIR lib CACHE STRING
+    "Installation directory for libraries, relative to ${CMAKE_INSTALL_PREFIX}.")
+  install(TARGETS cppformat DESTINATION ${FMT_LIB_DIR})
+  install(FILES format.h DESTINATION include/cppformat)
 endif ()