--- a/Makefile.PL
+++ b/Makefile.PL
@@ -176,6 +176,8 @@
 $hash{VERSION_FROM} = 'fftw.pd';
 $hash{clean}->{FILES} .= ' typespec MANIFEST.bak';
 push @{$hash{LIBS}},"-lm -L".join(" -L",@FFTW_lib_locations)." $lib";
+$hash{CONFIGURE_REQUIRES} = { 'PDL' => 2.004, };
+$hash{BUILD_REQUIRES} = { 'PDL' => 2.004, };
 $hash{PREREQ_PM} = { 'PDL' => 2.004, };
 $hash{CONFIGURE_REQUIRES} = { 'PDL' => 2.004, };
 $hash{META_MERGE} = {