diff --git a/pisi/util.py b/pisi/util.py
index 827d9b65..6200af6d 100644
--- a/pisi/util.py
+++ b/pisi/util.py
@@ -218,7 +218,7 @@ def uncompress(patchFile, compressType="gz", targetDir=None):
     if compressType == "gz":
         from gzip import GzipFile
         obj = GzipFile(patchFile)
-    elif compressType = "bz2":
+    elif compressType == "bz2":
         from bz2 import BZ2File
         obj = BZ2File(patchFile)