--- a/ipkg.py
+++ b/ipkg.py
@@ -93,9 +93,9 @@ class Package:
             self.filename = os.path.basename(fn)
 	    ## sys.stderr.write("  extracting control.tar.gz from %s\n"% (fn,)) 
             if self.isdeb:
-                control = os.popen("ar p "+fn+" control.tar.gz | tar xfzO - '*control'","r")
+                control = os.popen("ar p "+fn+" control.tar.gz | tar xzO --wildcards -f - '*control'","r")
             else:
-                control = os.popen("tar xfzO "+fn+" '*control.tar.gz' | tar xfzO - '*control'","r")
+                control = os.popen("tar xzO --wildcards -f "+fn+" '*control.tar.gz' | tar xzO --wildcards -f - '*control'","r")
             line = control.readline()
             while 1:
                 if not line: break
@@ -122,7 +122,7 @@ class Package:
             if self.isdeb:
                 data = os.popen("ar p "+fn+" data.tar.gz | tar tfz -","r")
             else:
-                data = os.popen("tar xfzO "+fn+" '*data.tar.gz' | tar tfz -","r")
+                data = os.popen("tar xzO --wildcards -f "+fn+" '*data.tar.gz' | tar tfz -","r")
             while 1:
                 line = data.readline()
                 if not line: break