diff --git a/src/TIVarFile.cpp b/src/TIVarFile.cpp
index 2709b60..f954eb1 100644
--- a/src/TIVarFile.cpp
+++ b/src/TIVarFile.cpp
@@ -16,6 +16,7 @@
 #include <numeric>
 #include <regex>
 #include <sstream>
+#include <cstring>
 
 namespace tivars
 {
diff --git a/src/TypeHandlers/TH_GDB.cpp b/src/TypeHandlers/TH_GDB.cpp
index a092fc8..7bdfcd8 100644
--- a/src/TypeHandlers/TH_GDB.cpp
+++ b/src/TypeHandlers/TH_GDB.cpp
@@ -9,6 +9,7 @@
 #include "../tivarslib_utils.h"
 
 #include <stdexcept>
+#include <cstring>
 
 #if defined(TH_GDB_SUPPORT) || defined(__cpp_lib_variant)
 
diff --git a/src/TypeHandlers/TH_Tokenized.cpp b/src/TypeHandlers/TH_Tokenized.cpp
index 3080014..8d9b3c0 100644
--- a/src/TypeHandlers/TH_Tokenized.cpp
+++ b/src/TypeHandlers/TH_Tokenized.cpp
@@ -19,6 +19,7 @@
 #include <sstream>
 #include <regex>
 #include <fstream>
+#include <cstring>
 
 static size_t strlen_mb(const std::string& s)
 {