Make compiler happy when MBEDTLS_USE_UECC disabled
diff --git a/tinycrypt/ecc.c b/tinycrypt/ecc.c
index c4a6770..090f691 100644
--- a/tinycrypt/ecc.c
+++ b/tinycrypt/ecc.c
@@ -937,6 +937,7 @@
 	curve->num_bytes, curve->num_bytes, _public + curve->num_words);
 	return 1;
 }
-
+#else
+typedef int mbedtls_dummy_uecc_def;
 #endif /* MBEDTLS_USE_UECC */
 
diff --git a/tinycrypt/ecc_dh.c b/tinycrypt/ecc_dh.c
index 7277879..5d0a52f 100644
--- a/tinycrypt/ecc_dh.c
+++ b/tinycrypt/ecc_dh.c
@@ -196,4 +196,6 @@
 
 	return r;
 }
+#else
+typedef int mbedtls_dummy_uecc_def;
 #endif /* MBEDTLS_USE_UECC */
diff --git a/tinycrypt/ecc_dsa.c b/tinycrypt/ecc_dsa.c
index d3e72a5..ff8a78a 100644
--- a/tinycrypt/ecc_dsa.c
+++ b/tinycrypt/ecc_dsa.c
@@ -292,5 +292,6 @@
 	/* Accept only if v == r. */
 	return (int)(uECC_vli_equal(rx, r, num_words) == 0);
 }
-
+#else
+typedef int mbedtls_dummy_uecc_def;
 #endif /* MBEDTLS_USE_UECC */