diff --git a/src/codegen_new/codegen_backend_arm64.c b/src/codegen_new/codegen_backend_arm64.c
index 6571a0ad3..2ccdab3a2 100644
--- a/src/codegen_new/codegen_backend_arm64.c
+++ b/src/codegen_new/codegen_backend_arm64.c
@@ -22,6 +22,7 @@
 #if defined WIN32 || defined _WIN32 || defined _WIN32
 #include <windows.h>
 #endif
+#include <string.h>
 
 void *codegen_mem_load_byte;
 void *codegen_mem_load_word;
diff --git a/src/codegen_new/codegen_backend_x86-64.c b/src/codegen_new/codegen_backend_x86-64.c
index e1a188310..7c3e4f39a 100644
--- a/src/codegen_new/codegen_backend_x86-64.c
+++ b/src/codegen_new/codegen_backend_x86-64.c
@@ -21,6 +21,7 @@
 #if defined WIN32 || defined _WIN32 || defined _WIN32
 #include <windows.h>
 #endif
+#include <string.h>
 
 void *codegen_mem_load_byte;
 void *codegen_mem_load_word;
diff --git a/src/codegen_new/codegen_backend_x86.c b/src/codegen_new/codegen_backend_x86.c
index 1e22caa2e..8aa2a5975 100644
--- a/src/codegen_new/codegen_backend_x86.c
+++ b/src/codegen_new/codegen_backend_x86.c
@@ -23,6 +23,7 @@
 #if defined WIN32 || defined _WIN32 || defined _WIN32
 #include <windows.h>
 #endif
+#include <string.h>
 
 void *codegen_mem_load_byte;
 void *codegen_mem_load_word;