diff --git a/source/rrConfig.cpp b/source/rrConfig.cpp
index e1180903ac..5046165e93 100644
--- a/source/rrConfig.cpp
+++ b/source/rrConfig.cpp
@@ -261,7 +261,7 @@ namespace rr {
             rr::Config::ALLOW_EVENTS_IN_STEADY_STATE_CALCULATIONS;
         keys["VALIDATION_IN_REGENERATION"] = rr::Config::VALIDATION_IN_REGENERATION;
         keys["K_ROWS_PER_WRITE"] = rr::Config::K_ROWS_PER_WRITE;
-        keys["LLVM_BACKEND"] = rr::Config::LLVM_BACKEND_VALUES::MCJIT;
+        keys["LLVM_BACKEND"] = rr::Config::LLVM_BACKEND_VALUES::LLJIT;
         keys["LLJIT_OPTIMIZATION_LEVEL"] = rr::Config::LLJIT_OPTIMIZATION_LEVELS::AGGRESSIVE;
         keys["LLJIT_NUM_THREADS"] = getDefaultNumThreads();
         keys["METABOLIC_CONTROL_ANALYSIS_FLUX_THRESHOLD"] = rr::Config::METABOLIC_CONTROL_ANALYSIS_FLUX_THRESHOLD;