diff --git a/builtins.cpp b/builtins.cpp
index 64f06e1f..e75f2107 100644
--- a/builtins.cpp
+++ b/builtins.cpp
@@ -419,6 +419,7 @@ lSetInternalFunctions(llvm::Module *module) {
         "__floor_uniform_float",
         "__floor_varying_double",
         "__floor_varying_float",
+        "__get_system_isa",
         "__half_to_float_uniform",
         "__half_to_float_varying",
         "__insert_int16",
@@ -513,6 +514,7 @@ lSetInternalFunctions(llvm::Module *module) {
         "__round_varying_float",
         "__rsqrt_uniform_float",
         "__rsqrt_varying_float",
+        "__set_system_isa",
         "__sext_uniform_bool",
         "__sext_varying_bool",
         "__shuffle2_double",