diff --git a/src/tools/dbdExpand.pl b/src/tools/dbdExpand.pl
index d65498d62..c72d25851 100755
--- a/src/tools/dbdExpand.pl
+++ b/src/tools/dbdExpand.pl
@@ -24,6 +24,8 @@ my @path = map { split /[:;]/ } @opt_I; # FIXME: Broken on Win32?
 my $macros = EPICS::macLib->new(@opt_S);
 my $dbd = DBD->new();
 
+$macros->suppressWarning(1);
+
 # Calculate filename for the dependency warning message below
 my $dep = $opt_o;
 my $dot_d = '';