diff --git a/include/polarssl/error.h b/include/polarssl/error.h
index c326154..f8c23e6 100644
--- a/include/polarssl/error.h
+++ b/include/polarssl/error.h
@@ -76,7 +76,8 @@
  * Name     ID  Nr of Errors
  * PEM      1   9
  * PKCS#12  1   4 (Started from top)
- * X509     2   23
+ * X509     2   25
+ * PK       2   1 (Started from top)
  * DHM      3   6
  * PKCS5    3   4 (Started from top)
  * RSA      4   9
diff --git a/include/polarssl/pk.h b/include/polarssl/pk.h
index 16aac43..3806027 100644
--- a/include/polarssl/pk.h
+++ b/include/polarssl/pk.h
@@ -27,6 +27,8 @@
 #ifndef POLARSSL_PK_H
 #define POLARSSL_PK_H
 
+#define POLARSSL_ERR_PK_MALLOC_FAILED       -0x2F80  /**< Memory alloation failed. */
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -66,8 +68,7 @@
  * \param ctx       Context to initialize
  * \param type      Type of key
  *
- * \return          O on success, -1 on memory allocation error
- *                  TODO: use appropriate error constant
+ * \return          O on success, or POLARSSL_ERR_PK_MALLOC_FAILED
  */
 int pk_set_type( pk_context *ctx, pk_type_t type );
 
diff --git a/library/error.c b/library/error.c
index 7042bbd..0a739b5 100644
--- a/library/error.c
+++ b/library/error.c
@@ -113,6 +113,10 @@
 #include "polarssl/pem.h"
 #endif
 
+#if defined(POLARSSL_PK_C)
+#include "polarssl/pk.h"
+#endif
+
 #if defined(POLARSSL_PKCS12_C)
 #include "polarssl/pkcs12.h"
 #endif
@@ -243,6 +247,11 @@
             snprintf( buf, buflen, "PEM - Bad input parameters to function" );
 #endif /* POLARSSL_PEM_C */
 
+#if defined(POLARSSL_PK_C)
+        if( use_ret == -(POLARSSL_ERR_PK_MALLOC_FAILED) )
+            snprintf( buf, buflen, "PK - Memory alloation failed" );
+#endif /* POLARSSL_PK_C */
+
 #if defined(POLARSSL_PKCS12_C)
         if( use_ret == -(POLARSSL_ERR_PKCS12_BAD_INPUT_DATA) )
             snprintf( buf, buflen, "PKCS12 - Bad input parameters to function" );
@@ -388,7 +397,7 @@
         if( use_ret == -(POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG) )
             snprintf( buf, buflen, "X509 - Signature algorithm (oid) is unsupported" );
         if( use_ret == -(POLARSSL_ERR_X509_UNKNOWN_PK_ALG) )
-            snprintf( buf, buflen, "X509 - Key algorithm is unsupported (only RSA is supported)" );
+            snprintf( buf, buflen, "X509 - Key algorithm is unsupported (only RSA and EC are supported)" );
         if( use_ret == -(POLARSSL_ERR_X509_CERT_SIG_MISMATCH) )
             snprintf( buf, buflen, "X509 - Certificate signature algorithms do not match. (see \\c ::x509_cert sig_oid)" );
         if( use_ret == -(POLARSSL_ERR_X509_CERT_VERIFY_FAILED) )
@@ -409,6 +418,8 @@
             snprintf( buf, buflen, "X509 - Private key password can't be empty" );
         if( use_ret == -(POLARSSL_ERR_X509_PASSWORD_MISMATCH) )
             snprintf( buf, buflen, "X509 - Given private key password does not allow for correct decryption" );
+        if( use_ret == -(POLARSSL_ERR_X509_UNKNOWN_NAMED_CURVE) )
+            snprintf( buf, buflen, "X509 - Elliptic curve is unsupported (only NIST curves are supported)" );
 #endif /* POLARSSL_X509_PARSE_C */
 
         if( strlen( buf ) == 0 )
diff --git a/library/pk.c b/library/pk.c
index a5f8d6b..ca99fc6 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -84,7 +84,7 @@
         return( 0 );
 
     if( ( ctx->data = malloc( size ) ) == NULL )
-        return( -1 );
+        return( POLARSSL_ERR_PK_MALLOC_FAILED );
 
     memset( ctx->data, 0, size );
     ctx->type = type;
diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index 009107b..7257ae6 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -13,7 +13,7 @@
                           "PADLOCK", "DES", "NET", "CTR_DRBG", "ENTROPY",
                           "MD2", "MD4", "MD5", "SHA1", "SHA256", "SHA512", "GCM" );
 my @high_level_modules = ( "PEM", "X509", "DHM", "RSA", "ECP", "MD", "CIPHER", "SSL",
-                           "PKCS12", "PKCS5" );
+                           "PK", "PKCS12", "PKCS5" );
 
 my $line_separator = $/;
 undef $/;