diff --git a/README b/README
index f13d704..ebe209d 100644
--- a/README
+++ b/README
@@ -1,3 +1,9 @@
 Ever wanted to share a pizza (or else) to anyone who offers a service, for example hosts a data sharing service?
 
-With PIZZA, you may now send pizza (or else) to any mailaddress out there!
\ No newline at end of file
+With PIZZA, you may now send pizza (or else) to any mailaddress out there!
+
+Usage: You need a running mail-service on your system (i.e. a postfix configured to use a smarthost).
+To run "pizza" from the bare repository, cd into the src directory and run
+
+export PIZZAINC="../assets"; ./pizza
+
diff --git a/src/pizza b/src/pizza
index 868b196..8258444 100755
--- a/src/pizza
+++ b/src/pizza
@@ -21,7 +21,7 @@ else
             mail -s "${PIZZAUSER} sent you a Pizza on ${PIZZAHOST}" $2 < "${PIZZAINC}/pizza"
             ;;
         "-l" | "--heart")
-            mail -s "${PIZZAUSER} sent you a Heart on ${PIZZAHOST}" $2 < "${PIZZAINC}/heart.txt"
+            mail -s "${PIZZAUSER} sent you a Heart on ${PIZZAHOST}" $2 < "${PIZZAINC}/heart"
             ;;
         "-h" | "--help")
             help