diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9e1e1ddec..68dd7fa3b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,8 @@ cmake_minimum_required(VERSION 3.1.0)
 
 project(sway C)
 
-set(FALLBACK_CONFIG_DIR "/etc/sway/")
+set(FALLBACK_CONFIG_DIR "/etc/sway" CACHE PATH
+  "Fallback config directory defaults to /etc/sway")
 add_definitions('-DFALLBACK_CONFIG_DIR=\"${FALLBACK_CONFIG_DIR}\"')
 
 set(CMAKE_C_FLAGS "-g")
diff --git a/sway/config.c b/sway/config.c
index dac3e8f8d..6a1d172b6 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -136,7 +136,7 @@ static char *get_config_path(void) {
 		"$XDG_CONFIG_HOME/sway/config",
 		"$HOME/.i3/config",
 		"$XDG_CONFIG_HOME/i3/config",
-                FALLBACK_CONFIG_DIR "config",
+                FALLBACK_CONFIG_DIR "/config",
 		"/etc/i3/config",
 	};