diff --git a/deps/simdutf/simdutf.h b/deps/simdutf/simdutf.h
index cd92c8ea04955d..e2734cb541ed02 100644
--- a/deps/simdutf/simdutf.h
+++ b/deps/simdutf/simdutf.h
@@ -4,6 +4,9 @@
 #define SIMDUTF_H
 #include <cstring>
 
+// Rename namespace to avoid conflict with simdutf from V8.
+ #define simdutf node_simdutf
+
 /* begin file include/simdutf/compiler_check.h */
 #ifndef SIMDUTF_COMPILER_CHECK_H
 #define SIMDUTF_COMPILER_CHECK_H