diff --git a/strings/manacher_algorithm.cpp b/strings/manacher_algorithm.cpp
index 94314c3b4..1c1581a33 100644
--- a/strings/manacher_algorithm.cpp
+++ b/strings/manacher_algorithm.cpp
@@ -11,6 +11,7 @@
  */
 
 #include <cassert>   /// for assert
+#include <cstdint>   /// for integral typedefs
 #include <iostream>  /// for IO operations
 #include <vector>    /// for std::vector STL
 #ifdef _MSC_VER
diff --git a/strings/z_function.cpp b/strings/z_function.cpp
index 6ce98c491..25a5755a7 100644
--- a/strings/z_function.cpp
+++ b/strings/z_function.cpp
@@ -11,6 +11,7 @@
  * @author [Ritika Gupta](https://github.com/RitikaGupta8734)
  */
 
+#include <cstdint>   /// for integral typedefs
 #include <iostream>  /// for IO operations
 #ifdef _MSC_VER
 #include <string>  /// for string (use this for MS Visual C++)