diff --git a/functions b/functions
index 262f70f..e498b3d 100644
--- a/functions
+++ b/functions
@@ -930,7 +930,7 @@
         CMD_PIP=$(get_pip_command)
     fi
 
-    if [[ is_fedora && $DISTRO =~ (rhel6) ]]; then
+    if is_fedora && [[ $DISTRO =~ (rhel6) ]]; then
         # RHEL6 pip by default doesn't have this (was introduced
         # around 0.8.1 or so)
         PIP_USE_MIRRORS=${PIP_USE_MIRRORS:-False}