diff --git a/gallery_dl/postprocessor/exec.py b/gallery_dl/postprocessor/exec.py
index a7a46d11..5a54a77c 100644
--- a/gallery_dl/postprocessor/exec.py
+++ b/gallery_dl/postprocessor/exec.py
@@ -30,8 +30,6 @@ class ExecPP(PostProcessor):
 
         args = options["command"]
         if isinstance(args, str):
-            if "{}" not in args:
-                args += " {}"
             self.args = args
             execute = self.exec_string
         else: