Index: clang/lib/Driver/ToolChains/Fuchsia.h
===================================================================
--- clang/lib/Driver/ToolChains/Fuchsia.h
+++ clang/lib/Driver/ToolChains/Fuchsia.h
@@ -56,6 +56,7 @@
   bool isPICDefault() const override { return false; }
   bool isPIEDefault() const override { return true; }
   bool isPICDefaultForced() const override { return false; }
+  unsigned GetDefaultDwarfVersion() const override { return 5; }
   llvm::DebuggerKind getDefaultDebuggerTuning() const override {
     return llvm::DebuggerKind::GDB;
   }
Index: clang/test/Driver/fuchsia.c
===================================================================
--- clang/test/Driver/fuchsia.c
+++ clang/test/Driver/fuchsia.c
@@ -50,6 +50,10 @@
 // CHECK-RELOCATABLE-NOT: "--build-id"
 // CHECK-RELOCATABLE: "-r"
 
+// RUN: %clang %s -### --target=x86_64-unknown-fuchsia -g 2>&1 \
+// RUN:     | FileCheck %s -check-prefix=CHECK-DEBUG
+// CHECK-DEBUG: "-dwarf-version=5"
+
 // RUN: %clang %s -### --target=x86_64-unknown-fuchsia \
 // RUN:     -fsanitize=safe-stack 2>&1 \
 // RUN:     | FileCheck %s -check-prefix=CHECK-SAFESTACK