diff --git a/pm_filter b/pm_filter
index 6c745e1f8..98cb5bd9e 100755
--- a/pm_filter
+++ b/pm_filter
@@ -23,6 +23,6 @@ elsif (/^use lib/) {
 elsif ($. == 1 && ($ENV{NOTAINT} || ! exists $ENV{NOTAINT}) && m{^(#!.*perl.*?) -T$}) {
 	$_=qq{$1\n};
 }
-if (/^\$ENV{PATH}="(.*)";/) {
+elsif (/^\$ENV{PATH}="(.*)";/) {
 	$_="\$ENV{PATH}=\"$1:$prefix/bin\";\n";
 }