diff --git a/gen/functions.cpp b/gen/functions.cpp
index 3c3e6d3d35..8b785f24dc 100644
--- a/gen/functions.cpp
+++ b/gen/functions.cpp
@@ -1172,6 +1172,10 @@ void DtoDefineFunction(FuncDeclaration *fd, bool linkageAvailableExternally) {
       func->addFnAttr(LLAttribute::SanitizeAddress);
     }
 
+    if (opts::isSanitizerEnabled(opts::FuzzSanitizer)) {
+      func->addFnAttr(LLAttribute::OptForFuzzing);
+    }
+    
     if (opts::isSanitizerEnabled(opts::MemorySanitizer & noSanitizeMask)) {
       func->addFnAttr(LLAttribute::SanitizeMemory);
     }
diff --git a/tests/codegen/attr_optforfuzzing.d b/tests/codegen/attr_optforfuzzing.d
new file mode 100644
index 0000000000..5597e0155d
--- /dev/null
+++ b/tests/codegen/attr_optforfuzzing.d
@@ -0,0 +1,6 @@
+// RUN: %ldc -c -output-ll -fsanitize=fuzzer -of=%t.ll %s && FileCheck %s < %t.ll
+
+// CHECK: define {{.*}} @f{{.*}} [[ATTR:#[0-9]+]]
+extern(C) void f() {}
+
+// CHECK: attributes [[ATTR]] = { {{.*}}optforfuzzing{{.*}} }
\ No newline at end of file