@@ -24,6 +24,10 @@
 package com.sun.jna.platform.unix;
 
 import com.sun.jna.Native;
+import com.sun.jna.platform.unix.LibCAPI.off_t;
+import com.sun.jna.platform.unix.LibCAPI.size_t;
+import com.sun.jna.platform.unix.LibCAPI.ssize_t;
+
 import java.sql.Date;
 import java.util.Map;
 
@@ -38,6 +42,19 @@ public LibCTest() {
         super();
     }
 
+    @Test
+    public void testSizeTypes() {
+        long VALUE = 20;
+        size_t st = new size_t(VALUE);
+        assertEquals("Wrong size_t value", VALUE, st.longValue());
+        ssize_t sst = new ssize_t(VALUE);
+        assertEquals("Wrong ssize_t value", VALUE, sst.longValue());
+        off_t ot = new off_t(VALUE);
+        assertEquals("Wrong off_t value", VALUE, ot.longValue());
+        ot = new off_t(VALUE, true);
+        assertEquals("Wrong 64 bit off_t value", VALUE, ot.longValue());
+    }
+
     @Test
     public void testGetenv() {
         Map<String, String> env = System.getenv();