diff --git a/src/tools/msvc/Solution.pm b/src/tools/msvc/Solution.pm
index fc71ebe..6861813 100644
--- a/src/tools/msvc/Solution.pm
+++ b/src/tools/msvc/Solution.pm
@@ -22,7 +22,8 @@ sub _new
 		VisualStudioVersion        => undef,
 		MinimumVisualStudioVersion => undef,
 		vcver                      => undef,
-		platform                   => undef, };
+		platform                   => undef,
+		ICUVersion                 => undef, };
 	bless($self, $classname);
 
 	$self->DeterminePlatform();
@@ -76,6 +77,29 @@ sub DeterminePlatform
 	print "Detected hardware platform: $self->{platform}\n";
 }
 
+sub DetermineICUVersion{
+
+	my $self = shift;
+
+	# get the icu version.
+	my $output = `uconv -V 2>&1`;
+	$? >> 8 == 0 or die "uconv command not found";
+
+	if ($output =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)?$/m)
+	{
+		$self->{ICUVersion} = $1.$2;
+	}
+	elsif ($output =~ /(\d+)\.(\d+)\.(\d+)?$/m)
+	{
+		$self->{ICUVersion} = $1;
+	}
+	elsif ($output =~ /(\d+)\.(\d+)?$/m)
+	{
+		$self->{ICUVersion} = $1;
+	}
+	print "Detected icu version : $self->{ICUVersion}\n";
+}
+
 # Return 1 if $oldfile is newer than $newfile, or if $newfile doesn't exist.
 # Special case - if config.pl has changed, always return 1
 sub IsNewer
@@ -222,7 +246,9 @@ s{PG_VERSION_STR "[^"]+"}{PG_VERSION_STR "PostgreSQL $self->{strver}$extraver, c
 		}
 		if ($self->{options}->{icu})
 		{
+			$self->DetermineICUVersion();
 			print $o "#define USE_ICU 1\n";
+			print $o "#define HAVE_UCOL_STRCOLLUTF8 1\n" if ($self->{ICUVersion} >= 50);
 		}
 		if (my $port = $self->{options}->{"--with-pgport"})
 		{