diff --git a/sdclang/sdclang.json b/sdclang/sdclang.json
index 5230bef4..04d1b616 100644
--- a/sdclang/sdclang.json
+++ b/sdclang/sdclang.json
@@ -1,7 +1,7 @@
 {
     "default" : {
         "SDCLANG" : true,
-        "SDCLANG_PATH" : "vendor/qcom/sdclang-4.0/linux-x86/bin",
+        "SDCLANG_PATH" : "vendor/qcom/sdclang-3.9/linux-x86/bin",
         "SDCLANG_PATH_2" : "vendor/qcom/sdclang-4.0/linux-x86/bin",
         "SDCLANG_FLAGS" : "-O3 -fvectorize-loops -Wno-vectorizer-no-neon -Wno-user-defined-warnings",
         "SDCLANG_FLAGS_2" : "-O3 -fvectorize-loops -Wno-vectorizer-no-neon -Wno-user-defined-warnings"