diff --git a/CMakeLists.txt b/CMakeLists.txt
index 66464c9c..f7ee45e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,7 +57,7 @@ if (BUILD_DEPS)
         # prebuild s2n-tls.
         aws_prebuild_dependency(
             DEPENDENCY_NAME S2N
-            SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/s2n
+            SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/crt/s2n
             CMAKE_ARGUMENTS
                 -DUNSAFE_TREAT_WARNINGS_AS_ERRORS=OFF
                 -DBUILD_TESTING=OFF