diff --git a/argon2.spec b/argon2.spec
index 95c423f..677b12a 100644
--- a/argon2.spec
+++ b/argon2.spec
@@ -77,7 +77,8 @@ password hashing function that won the Password Hashing Competition
 (PHC) in 2015.
 
 %prep
-%autosetup
+%setup -n phc-winner-argon2-%version
+%patch1 -p1
 
 %build
 %make