diff --git a/src/tools/gcc.jam b/src/tools/gcc.jam
index c8964d12f..599e20ff7 100644
--- a/src/tools/gcc.jam
+++ b/src/tools/gcc.jam
@@ -1025,7 +1025,7 @@ rule setup-threading ( targets * : sources * : properties * )
 
         switch $(target)
         {
-            case android:  # No threading options, everything is in already.
+            case android : # No threading options, everything is in already.
             case windows : option = -mthreads ;
             case cygwin  : option = -mthreads ;
             case solaris : option = -pthreads ; libs = rt ;