diff --git a/library/ecp.c b/library/ecp.c
index 7cfb44f..d742e81 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -483,8 +483,13 @@
     int ret;
     size_t plen;
 
-    if( ilen == 1 && buf[0] == 0x00 )
-        return( ecp_set_zero( pt ) );
+    if( buf[0] == 0x00 )
+    {
+        if( ilen == 1 )
+            return( ecp_set_zero( pt ) );
+        else
+            return( POLARSSL_ERR_ECP_BAD_INPUT_DATA );
+    }
 
     plen = mpi_size( &grp->P );
 
diff --git a/tests/suites/test_suite_ecp.data b/tests/suites/test_suite_ecp.data
index a1833d4..278fa88 100644
--- a/tests/suites/test_suite_ecp.data
+++ b/tests/suites/test_suite_ecp.data
@@ -213,7 +213,7 @@
 
 ECP read binary #2 (zero, invalid first byte)
 depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
-ecp_read_binary:POLARSSL_ECP_DP_SECP192R1:"01":"01":"01":"00":POLARSSL_ERR_ECP_BAD_INPUT_DATA
+ecp_read_binary:POLARSSL_ECP_DP_SECP192R1:"01":"01":"01":"00":POLARSSL_ERR_ECP_FEATURE_UNAVAILABLE
 
 ECP read binary #3 (zero, OK)
 depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
@@ -225,7 +225,7 @@
 
 ECP read binary #5 (non-zero, invalid first byte)
 depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
-ecp_read_binary:POLARSSL_ECP_DP_SECP192R1:"0548d8082a3a1e3112bc03a8ef2f6d40d0a77a6f8e00cc99336ceed4d7cba482e288669ee1b6415626d6f34d28501e060c":"48d8082a3a1e3112bc03a8ef2f6d40d0a77a6f8e00cc9933":"6ceed4d7cba482e288669ee1b6415626d6f34d28501e060c":"01":POLARSSL_ERR_ECP_BAD_INPUT_DATA
+ecp_read_binary:POLARSSL_ECP_DP_SECP192R1:"0548d8082a3a1e3112bc03a8ef2f6d40d0a77a6f8e00cc99336ceed4d7cba482e288669ee1b6415626d6f34d28501e060c":"48d8082a3a1e3112bc03a8ef2f6d40d0a77a6f8e00cc9933":"6ceed4d7cba482e288669ee1b6415626d6f34d28501e060c":"01":POLARSSL_ERR_ECP_FEATURE_UNAVAILABLE
 
 ECP read binary #6 (non-zero, OK)
 depends_on:POLARSSL_ECP_DP_SECP192R1_ENABLED
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index 1f04d67..50a95e1 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -472,7 +472,7 @@
     TEST_ASSERT( ecp_tls_write_point( &grp, &grp.G,
                     POLARSSL_ECP_PF_COMPRESSED, &olen, buf, 256 ) == 0 );
     TEST_ASSERT( ecp_tls_read_point( &grp, &pt, &vbuf, olen )
-                 == POLARSSL_ERR_ECP_BAD_INPUT_DATA );
+                 == POLARSSL_ERR_ECP_FEATURE_UNAVAILABLE );
     TEST_ASSERT( vbuf == buf + olen );
 
     memset( buf, 0x00, sizeof( buf ) ); vbuf = buf;