diff --git a/processing/setup/setup_processing.py b/processing/setup/setup_processing.py
index e560938a0..37f9e5d88 100755
--- a/processing/setup/setup_processing.py
+++ b/processing/setup/setup_processing.py
@@ -148,7 +148,7 @@ for dir in compile:
       except:
         pass
       print 'compiling ',src,'using',compiler
-      os.system('%s -O2 -o%s.exe %s'%(compiler,os.path.splitext(src)[0],src))
+      os.system('%s -O2 -o %s.exe %s'%(compiler,os.path.splitext(src)[0],src))
  
 os.chdir(codeDir)                   # needed for compilation with gfortran and f2py
 for tasks in execute: