diff --git a/src/scintilla/include/ScintillaTypes.h b/src/scintilla/include/ScintillaTypes.h
index 6d3e2a705..d82358749 100644
--- a/src/scintilla/include/ScintillaTypes.h
+++ b/src/scintilla/include/ScintillaTypes.h
@@ -10,6 +10,7 @@
 
 #ifndef SCINTILLATYPES_H
 #define SCINTILLATYPES_H
+#include <cstdint>
 
 namespace Scintilla {
 
diff --git a/src/scintilla/qt/ScintillaEditBase/PlatQt.h b/src/scintilla/qt/ScintillaEditBase/PlatQt.h
index 0abbcaf28..44776d665 100644
--- a/src/scintilla/qt/ScintillaEditBase/PlatQt.h
+++ b/src/scintilla/qt/ScintillaEditBase/PlatQt.h
@@ -10,6 +10,7 @@
 
 #ifndef PLATQT_H
 #define PLATQT_H
+#include <cstdint>
 
 #include <cstddef>
 
diff --git a/src/scintilla/qt/ScintillaEditBase/ScintillaEditBase.h b/src/scintilla/qt/ScintillaEditBase/ScintillaEditBase.h
index f4f0b0912..1bfdab90b 100644
--- a/src/scintilla/qt/ScintillaEditBase/ScintillaEditBase.h
+++ b/src/scintilla/qt/ScintillaEditBase/ScintillaEditBase.h
@@ -11,6 +11,7 @@
 
 #ifndef SCINTILLAEDITBASE_H
 #define SCINTILLAEDITBASE_H
+#include <cstdint>
 
 #include <cstddef>