diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index c5f839e..852801a 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1616,6 +1616,9 @@
   if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_flush_denormals_to_zero))
     Opts.CUDADeviceFlushDenormalsToZero = 1;
 
+  if (Opts.CUDAIsDevice && Args.hasArg(OPT_fcuda_approx_transcendentals))
+    Opts.CUDADeviceApproxTranscendentals = 1;
+
   if (Opts.ObjC1) {
     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
       StringRef value = arg->getValue();