diff --git a/nasm.spec b/nasm.spec
index e0f0f43..cc66103 100644
--- a/nasm.spec
+++ b/nasm.spec
@@ -52,7 +52,7 @@ include linker, library manager, loader, and information dump.
 %prep
 %setup -q
 
-tar xjf %{SOURCE1} --strip-components 1
+tar xJf %{SOURCE1} --strip-components 1
 
 %build
 autoreconf