diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2100d2492..b9a70daa9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -76,6 +76,11 @@ if(SECP256K1_ENABLE_MODULE_ELLSWIFT)
   add_compile_definitions(ENABLE_MODULE_ELLSWIFT=1)
 endif()
 
+option(SECP256K1_ENABLE_MODULE_ECDSA_S2C "Enable ECDSA sign-to-contract module" ON)
+if(SECP256K1_ENABLE_MODULE_ECDSA_S2C)
+    add_compile_definitions(ENABLE_MODULE_ECDSA_S2C=1)
+endif()
+
 option(SECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS "Enable external default callback functions." OFF)
 if(SECP256K1_USE_EXTERNAL_DEFAULT_CALLBACKS)
   add_compile_definitions(USE_EXTERNAL_DEFAULT_CALLBACKS=1)
@@ -276,6 +281,7 @@ message("  ECDSA pubkey recovery ............... ${SECP256K1_ENABLE_MODULE_RECOV
 message("  extrakeys ........................... ${SECP256K1_ENABLE_MODULE_EXTRAKEYS}")
 message("  schnorrsig .......................... ${SECP256K1_ENABLE_MODULE_SCHNORRSIG}")
 message("  ElligatorSwift ...................... ${SECP256K1_ENABLE_MODULE_ELLSWIFT}")
+message("  ECDSA sign-to-contract .............. ${SECP256K1_ENABLE_MODULE_ECDSA_S2C}")
 message("Parameters:")
 message("  ecmult window size .................. ${SECP256K1_ECMULT_WINDOW_SIZE}")
 message("  ecmult gen precision bits ........... ${SECP256K1_ECMULT_GEN_PREC_BITS}")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4cbaeb914..283ad8718 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -135,6 +135,9 @@ if(SECP256K1_INSTALL)
   if(SECP256K1_ENABLE_MODULE_ELLSWIFT)
     list(APPEND ${PROJECT_NAME}_headers "${PROJECT_SOURCE_DIR}/include/secp256k1_ellswift.h")
   endif()
+  if(SECP256K1_ENABLE_MODULE_ECDSA_S2C)
+    list(APPEND ${PROJECT_NAME}_headers "${PROJECT_SOURCE_DIR}/include/secp256k1_ecdsa_s2c.h")
+  endif()
   install(FILES ${${PROJECT_NAME}_headers}
     DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
   )