diff --git a/source/icu.net.tests/BreakIteratorTests.cs b/source/icu.net.tests/BreakIteratorTests.cs
index 4a115d74..f8c6b71d 100644
--- a/source/icu.net.tests/BreakIteratorTests.cs
+++ b/source/icu.net.tests/BreakIteratorTests.cs
@@ -58,6 +58,17 @@ public void GetBoundaries_Line()
 			Assert.That(parts.ToArray(), Is.EquivalentTo(expected));
 		}
 
+		[Test]
+		public void GetBoundaries_LocaleDependentBreakPoints_Line()
+		{
+			var text = "論‼";
+
+			var parts = BreakIterator.GetBoundaries(BreakIterator.UBreakIteratorType.LINE, new Locale("ja@lb=loose"), text);
+
+			// we only get 2 boundaries if the ja locale is passed correctly
+			Assert.That(parts.Count(), Is.EqualTo(2));
+		}
+
 		[Test]
 		public void GetBoundaries_Sentence()
 		{
diff --git a/source/icu.net/NativeMethods/NativeMethods_BreakIterator.cs b/source/icu.net/NativeMethods/NativeMethods_BreakIterator.cs
index 515c7bd8..d5faa0f1 100644
--- a/source/icu.net/NativeMethods/NativeMethods_BreakIterator.cs
+++ b/source/icu.net/NativeMethods/NativeMethods_BreakIterator.cs
@@ -12,7 +12,7 @@ private class BreakIteratorMethodsContainer
 		{
 			[UnmanagedFunctionPointer(CallingConvention.Cdecl, CharSet = CharSet.Unicode)]
 			internal delegate IntPtr ubrk_openDelegate(BreakIterator.UBreakIteratorType type,
-				string locale, string text, int textLength, out ErrorCode errorCode);
+				[MarshalAs(UnmanagedType.LPStr)] string locale, string text, int textLength, out ErrorCode errorCode);
 
 			[UnmanagedFunctionPointer(CallingConvention.Cdecl, CharSet = CharSet.Unicode)]
 			internal delegate IntPtr ubrk_openRulesDelegate(string rules, int rulesLength,