diff --git a/CHANGES.txt b/CHANGES.txt
index 6ad16741e9..a162aeb70a 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
 4.0
+ * Upgrade the jna version to 4.3.0 (CASSANDRA-13300)
  * Add the currentTimestamp, currentDate, currentTime and currentTimeUUID functions (CASSANDRA-13132)
  * Remove config option index_interval (CASSANDRA-10671)
  * Reduce lock contention for collection types and serializers (CASSANDRA-13271)
diff --git a/lib/jna-4.0.0.jar b/lib/jna-4.0.0.jar
deleted file mode 100644
index 9038048dc2..0000000000
Binary files a/lib/jna-4.0.0.jar and /dev/null differ
diff --git a/lib/jna-4.3.0.jar b/lib/jna-4.3.0.jar
new file mode 100644
index 0000000000..713354e593
Binary files /dev/null and b/lib/jna-4.3.0.jar differ
diff --git a/lib/licenses/jna-4.0.0.txt b/lib/licenses/jna-4.3.0.txt
similarity index 100%
rename from lib/licenses/jna-4.0.0.txt
rename to lib/licenses/jna-4.3.0.txt
diff --git a/src/java/org/apache/cassandra/utils/CLibrary.java b/src/java/org/apache/cassandra/utils/CLibrary.java
index ae3ce63fad..8824b9a4e8 100644
--- a/src/java/org/apache/cassandra/utils/CLibrary.java
+++ b/src/java/org/apache/cassandra/utils/CLibrary.java
@@ -126,11 +126,15 @@ public final class CLibrary
     private static OSType getOsType()
     {
         String osName = System.getProperty("os.name").toLowerCase();
-        if (osName.contains("mac"))
+        if  (osName.contains("linux"))
+            return LINUX;
+        else if (osName.contains("mac"))
             return MAC;
         else if (osName.contains("windows"))
             return WINDOWS;
-        else if (osName.contains("aix"))
+
+        logger.warn("the current operating system, {}, is unsupported by cassandra", osName);
+        if (osName.contains("aix"))
             return AIX;
         else
             // fall back to the Linux impl for all unknown OS types until otherwise implicitly supported as needed