diff --git a/library/ecp_curves.c b/library/ecp_curves.c
index a2a5495..df5ac3e 100644
--- a/library/ecp_curves.c
+++ b/library/ecp_curves.c
@@ -31,6 +31,8 @@
 
 #include <string.h>
 
+#if !defined(MBEDTLS_ECP_ALT)
+
 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
     !defined(inline) && !defined(__cplusplus)
 #define inline __inline
@@ -1322,4 +1324,6 @@
 }
 #endif /* MBEDTLS_ECP_DP_SECP256K1_ENABLED */
 
+#endif /* !MBEDTLS_ECP_ALT */
+
 #endif /* MBEDTLS_ECP_C */