diff --git a/fml/install/fml.py b/fml/install/fml.py
index 2d6d9a448..cde365b0a 100644
--- a/fml/install/fml.py
+++ b/fml/install/fml.py
@@ -157,7 +157,7 @@ def setup_fml(fml_dir, mcp_dir):
             os.makedirs(binDir)
             
         #Compile AccessTransformer
-        forkcmd = ('%s -Xlint:-options -deprecation -g -source 1.6 -target 1.6 -classpath "{classpath}" -sourcepath {sourcepath} -d {outpath} {target}' % self.cmdjavac).format(
+        forkcmd = ('%s -Xlint:-options -deprecation -g -source 1.6 -target 1.6 -classpath "{classpath}" -sourcepath "{sourcepath}" -d "{outpath}" "{target}"' % self.cmdjavac).format(
             classpath=os.pathsep.join(['.', os.path.join(mcp_dir, 'lib', '*')]), sourcepath=os.path.join(fml_dir, 'common'), outpath=os.path.join(fml_dir, 'bin'), 
             target=os.path.join(fml_dir, 'common', 'cpw', 'mods', 'fml', 'common', 'asm', 'transformers', 'AccessTransformer.java'))
         #print forkcmd