diff --git a/src/secp256k1/CMakeLists.txt b/src/secp256k1/CMakeLists.txt
--- a/src/secp256k1/CMakeLists.txt
+++ b/src/secp256k1/CMakeLists.txt
@@ -4,9 +4,11 @@
 project(secp256k1)
 
 # Add path for custom modules
-set(CMAKE_MODULE_PATH
-	${CMAKE_MODULE_PATH}
+list(APPEND CMAKE_MODULE_PATH
+	# For building as part of the bitcoin-abc project
 	${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/modules
+	# For building as a standalone project
+	${CMAKE_SOURCE_DIR}/cmake/modules
 )
 
 include(AddCompilerFlags)