diff --git a/src/string_bytes.h b/src/string_bytes.h
index e11b73b69e10b7..69bb828e018cb0 100644
--- a/src/string_bytes.h
+++ b/src/string_bytes.h
@@ -26,14 +26,7 @@
 
 // Decodes a v8::Local<v8::String> or Buffer to a raw char*
 
-#if (__GNUC__ >= 8) && !defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wcast-function-type"
-#endif
 #include "v8.h"
-#if (__GNUC__ >= 8) && !defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
 #include "env-inl.h"
 
 #include <string>
diff --git a/test/cctest/test_aliased_buffer.cc b/test/cctest/test_aliased_buffer.cc
index 4dab70d0b576cb..ba947700c1bf27 100644
--- a/test/cctest/test_aliased_buffer.cc
+++ b/test/cctest/test_aliased_buffer.cc
@@ -1,11 +1,4 @@
-#if (__GNUC__ >= 8) && !defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wcast-function-type"
-#endif
 #include "v8.h"
-#if (__GNUC__ >= 8) && !defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
 #include "aliased_buffer.h"
 #include "node_test_fixture.h"