Updated README.md

@@ -247,9 +247,11 @@ Open the "Build Settings" tab, in the "Linking" section, locate the "Other Linke
 
 ![Other Linker Flags](http://dl.dropbox.com/u/123346/SDWebImage/10_other_linker_flags.jpg)
 
-Alternatively—if this causes compilation problems with frameworks that extend optional libraries, such as Parse or RestKit—instead of the -ObjC flag use:
+Alternatively, if this causes compilation problems with frameworks that extend optional libraries, such as Parse,  RestKit or opencv2, instead of the -ObjC flag use:
 
+```
 -force_load SDWebImage.framework/Versions/Current/SDWebImage
+```
 
 ### Import headers in your source files