diff --git a/external/MbedTLS/mbedtls-init-cache.cmake.in b/external/MbedTLS/mbedtls-init-cache.cmake.in
index bf93f1b..a633781 100644
--- a/external/MbedTLS/mbedtls-init-cache.cmake.in
+++ b/external/MbedTLS/mbedtls-init-cache.cmake.in
@@ -11,7 +11,7 @@
 set(ENABLE_PROGRAMS Off CACHE BOOL "")
 set(ENABLE_TESTING Off CACHE BOOL "")
 set(UNSAFE_BUILD On CACHE BOOL "")
-set(EXTERNAL_DEFINITIONS -DMBEDTLS_USER_CONFIG_FILE="@MBEDTLS_USER_CONFIG_FILE@" CACHE STRING "")
+set(EXTERNAL_DEFINITIONS -DMBEDTLS_CONFIG_FILE="@MBEDTLS_CONFIG_FILE@" CACHE STRING "")
 set(EXTERNAL_INCLUDE_PATHS @MBEDTLS_EXTRA_INCLUDES@ CACHE STRING "")
 set(BRANCH_PROTECTION @BRANCH_PROTECTION@ CACHE STRING "")