diff --git a/library/ecp.c b/library/ecp.c
index f450056..044bbe1 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -99,7 +99,7 @@
 #define mbedtls_free       free
 #endif
 
-#include "ecp_alt.h"
+#include "ecp_internal_alt.h"
 
 #if !defined(MBEDTLS_ECP_NO_INTERNAL_RNG)
 #if defined(MBEDTLS_HMAC_DRBG_C)