diff --git a/deps/simdutf/simdutf.h b/deps/simdutf/simdutf.h
index 3514f117dd2360..f3f63e78d94d7b 100644
--- a/deps/simdutf/simdutf.h
+++ b/deps/simdutf/simdutf.h
@@ -1599,7 +1599,7 @@ class implementation {
    *
    * @return a mask of all required `internal::instruction_set::` values
    */
-  virtual uint32_t required_instruction_sets() const { return _required_instruction_sets; };
+  virtual uint32_t required_instruction_sets() const { return _required_instruction_sets; }
 
 
   /**
diff --git a/node.gyp b/node.gyp
index f1844720762529..f5da2fa3599ed1 100644
--- a/node.gyp
+++ b/node.gyp
@@ -96,6 +96,7 @@
         '-W',
         '-Wno-unused-parameter',
         '-Werror=undefined-inline',
+        '-Werror=extra-semi',
       ],
     },
 
diff --git a/node.gypi b/node.gypi
index ecd2ea6ea87deb..e8dd7fe2be3100 100644
--- a/node.gypi
+++ b/node.gypi
@@ -27,7 +27,7 @@
 
   'conditions': [
     [ 'clang==1', {
-      'cflags': [ '-Werror=undefined-inline', ]
+      'cflags': [ '-Werror=undefined-inline', '-Werror=extra-semi']
     }],
     [ '"<(_type)"=="executable"', {
       'msvs_settings': {