diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index 30ae79e..071ac61 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -4608,6 +4608,8 @@
 #endif
 #if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
 static int ecp_mod_p192k1(mbedtls_mpi *);
+MBEDTLS_TEST_HOOKS
+int mbedtls_ecp_mod_p192k1(mbedtls_mpi *);
 #endif
 #if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
 static int ecp_mod_p224k1(mbedtls_mpi *);
@@ -5605,6 +5607,12 @@
  */
 static int ecp_mod_p192k1(mbedtls_mpi *N)
 {
+    return mbedtls_ecp_mod_p192k1(N);
+}
+
+MBEDTLS_STATIC_TESTABLE
+int mbedtls_ecp_mod_p192k1(mbedtls_mpi *N)
+{
     static mbedtls_mpi_uint Rp[] = {
         MBEDTLS_BYTES_TO_T_UINT_8(0xC9, 0x11, 0x00, 0x00, 0x01, 0x00, 0x00,
                                   0x00)