diff --git a/Makefile b/Makefile
index 5e1069258..828921d86 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ NAME    := unsee
 VERSION := $(shell git describe --tags --always --dirty='-dev')
 
 # Alertmanager instance used when running locally, points to mock data
-ALERTMANAGER_URI := file://$(CURDIR)mock/0.5
+ALERTMANAGER_URI := file://$(CURDIR)/mock/0.5
 # Listen port when running locally
 PORT := 8080