diff --git a/src/tools/msvc/Install.pm b/src/tools/msvc/Install.pm
index 53cd5e9c45f..a839429e2f7 100644
--- a/src/tools/msvc/Install.pm
+++ b/src/tools/msvc/Install.pm
@@ -58,8 +58,8 @@ sub Install
 
 		# suppress warning about harmless redeclaration of $config
 		no warnings 'misc';
-		do "config_default.pl";
-		do "config.pl" if (-f "config.pl");
+		do "./config_default.pl";
+		do "./config.pl" if (-f "config.pl");
 	}
 
 	chdir("../../..")    if (-f "../../../configure");
diff --git a/src/tools/msvc/build.pl b/src/tools/msvc/build.pl
index 744c1f7d6ee..b5c8b087a42 100644
--- a/src/tools/msvc/build.pl
+++ b/src/tools/msvc/build.pl
@@ -23,7 +23,7 @@ use Mkvcbuild;
 
 if (-e "src/tools/msvc/buildenv.pl")
 {
-	do "src/tools/msvc/buildenv.pl";
+	do "./src/tools/msvc/buildenv.pl";
 }
 elsif (-e "./buildenv.pl")
 {
@@ -32,8 +32,8 @@ elsif (-e "./buildenv.pl")
 
 # set up the project
 our $config;
-do "config_default.pl";
-do "config.pl" if (-f "src/tools/msvc/config.pl");
+do "./config_default.pl";
+do "./config.pl" if (-f "src/tools/msvc/config.pl");
 
 my $vcver = Mkvcbuild::mkvcbuild($config);
 
diff --git a/src/tools/msvc/install.pl b/src/tools/msvc/install.pl
index 90425ca8fc6..47cdba35361 100755
--- a/src/tools/msvc/install.pl
+++ b/src/tools/msvc/install.pl
@@ -18,7 +18,7 @@ use Install qw(Install);
 
 if (-e "src/tools/msvc/buildenv.pl")
 {
-	do "src/tools/msvc/buildenv.pl";
+	do "./src/tools/msvc/buildenv.pl";
 }
 elsif (-e "./buildenv.pl")
 {
diff --git a/src/tools/msvc/mkvcbuild.pl b/src/tools/msvc/mkvcbuild.pl
index 34e861375c0..f5505b98c26 100644
--- a/src/tools/msvc/mkvcbuild.pl
+++ b/src/tools/msvc/mkvcbuild.pl
@@ -23,7 +23,7 @@ print "Warning: no config.pl found, using default.\n"
   unless (-f 'src/tools/msvc/config.pl');
 
 our $config;
-do 'src/tools/msvc/config_default.pl';
-do 'src/tools/msvc/config.pl' if (-f 'src/tools/msvc/config.pl');
+do './src/tools/msvc/config_default.pl';
+do './src/tools/msvc/config.pl' if (-f 'src/tools/msvc/config.pl');
 
 Mkvcbuild::mkvcbuild($config);
diff --git a/src/tools/msvc/pgbison.pl b/src/tools/msvc/pgbison.pl
index e799d900fe0..895e398c08c 100644
--- a/src/tools/msvc/pgbison.pl
+++ b/src/tools/msvc/pgbison.pl
@@ -7,7 +7,7 @@ use File::Basename;
 
 # assume we are in the postgres source root
 
-do 'src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
+do './src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
 
 my ($bisonver) = `bison -V`;    # grab first line
 $bisonver = (split(/\s+/, $bisonver))[3];    # grab version number
diff --git a/src/tools/msvc/pgflex.pl b/src/tools/msvc/pgflex.pl
index eba06f2824a..aceed5ffd6c 100644
--- a/src/tools/msvc/pgflex.pl
+++ b/src/tools/msvc/pgflex.pl
@@ -10,7 +10,7 @@ $ENV{CYGWIN} = 'nodosfilewarning';
 
 # assume we are in the postgres source root
 
-do 'src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
+do './src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
 
 my ($flexver) = `flex -V`;    # grab first line
 $flexver = (split(/\s+/, $flexver))[1];
diff --git a/src/tools/msvc/vcregress.pl b/src/tools/msvc/vcregress.pl
index 5227023ad0c..cee2673d8a1 100644
--- a/src/tools/msvc/vcregress.pl
+++ b/src/tools/msvc/vcregress.pl
@@ -22,8 +22,8 @@ chdir "../../.." if (-d "../../../src/tools/msvc");
 my $topdir         = getcwd();
 my $tmp_installdir = "$topdir/tmp_install";
 
-do 'src/tools/msvc/config_default.pl';
-do 'src/tools/msvc/config.pl' if (-f 'src/tools/msvc/config.pl');
+do './src/tools/msvc/config_default.pl';
+do './src/tools/msvc/config.pl' if (-f 'src/tools/msvc/config.pl');
 
 # buildenv.pl is for specifying the build environment settings
 # it should contain lines like:
@@ -31,7 +31,7 @@ do 'src/tools/msvc/config.pl' if (-f 'src/tools/msvc/config.pl');
 
 if (-e "src/tools/msvc/buildenv.pl")
 {
-	do "src/tools/msvc/buildenv.pl";
+	do "./src/tools/msvc/buildenv.pl";
 }
 
 my $what = shift || "";