diff --git a/src/laminar.cpp b/src/laminar.cpp
index 54bd7f9..7490409 100644
--- a/src/laminar.cpp
+++ b/src/laminar.cpp
@@ -80,6 +80,9 @@ Laminar::Laminar(const char *home) :
     archiveUrl = ARCHIVE_URL_DEFAULT;
     if(char* envArchive = getenv("LAMINAR_ARCHIVE_URL"))
         archiveUrl = envArchive;
+	if(archiveUrl.back() != '/')
+		archiveUrl.append("/");
+
     numKeepRunDirs = 0;
 
     db = new Database((homePath/"laminar.sqlite").toString(true).cStr());