diff --git a/src/cc/cclib.cpp b/src/cc/cclib.cpp
index f02d63dbd..3cfb1a185 100644
--- a/src/cc/cclib.cpp
+++ b/src/cc/cclib.cpp
@@ -579,6 +579,7 @@ cJSON *cclib_reparse(int32_t *nump,cJSON *origparams) // assumes origparams will
 
 #else
 #include "sudoku.cpp"
+#define SECP256K1_BUILD
 #include "../secp256k1/src/secp256k1.c"
 #include "musig.cpp"
 #endif