Fix typo in an OID name

fixes #314
diff --git a/ChangeLog b/ChangeLog
index 71fdd7b..5af1609 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,7 @@
      exchange. Found and fix provided by Chris Hammond. #270
    * Fix failures in MPI on Sparc(64) due to use of bad assembly code.
      Found by Kurt Danielson. #292
+   * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314
 
 = mbed TLS 1.3.14 released 2015-10-06
 
diff --git a/library/oid.c b/library/oid.c
index b616d7e..682b845 100644
--- a/library/oid.c
+++ b/library/oid.c
@@ -268,7 +268,7 @@
         EXT_KEY_USAGE,
     },
     {
-        { ADD_LEN( OID_EXTENDED_KEY_USAGE ),   "id-ce-keyUsage",           "Extended Key Usage" },
+        { ADD_LEN( OID_EXTENDED_KEY_USAGE ),   "id-ce-extKeyUsage",        "Extended Key Usage" },
         EXT_EXTENDED_KEY_USAGE,
     },
     {