diff --git a/src/config.d b/src/config.d
index a8cc1d66..f3af8308 100644
--- a/src/config.d
+++ b/src/config.d
@@ -6,9 +6,14 @@ struct Config
 
 	this(string[] filenames...)
 	{
+		bool found = false;
 		foreach (filename; filenames) {
-			load(filename);
+			if (exists(filename)) {
+				found = true;
+				load(filename);
+			}
 		}
+		if (!found) throw new Exception("No config file found");
 	}
 
 	string get(string key)
@@ -23,19 +28,17 @@ struct Config
 
 	private void load(string filename)
 	{
-		if (exists(filename)) {
-			auto file = File(filename, "r");
-			auto r = regex("(?:^\\s*)(\\w+)(?:\\s*=\\s*\")(.*)(?:\"\\s*$)");
-			foreach (line; file.byLine()) {
-				auto c = line.matchFirst(r);
-				if (!c.empty) {
-					c.popFront(); // skip the whole match
-					string key = c.front.dup;
-					c.popFront();
-					values[key] = c.front.dup;
-				} else {
-					writeln("Malformed config line: ", line);
-				}
+		auto file = File(filename, "r");
+		auto r = regex("(?:^\\s*)(\\w+)(?:\\s*=\\s*\")(.*)(?:\"\\s*$)");
+		foreach (line; file.byLine()) {
+			auto c = line.matchFirst(r);
+			if (!c.empty) {
+				c.popFront(); // skip the whole match
+				string key = c.front.dup;
+				c.popFront();
+				values[key] = c.front.dup;
+			} else {
+				writeln("Malformed config line: ", line);
 			}
 		}
 	}
@@ -46,3 +49,12 @@ unittest
 	auto cfg = Config("empty", "onedrive.conf");
 	assert(cfg.get("sync_dir") == "~/OneDrive");
 }
+
+unittest
+{
+	try {
+		auto cfg = Config("empty");
+		assert(0);
+	} catch (Exception e) {
+	}
+}