diff --git a/OutputFormat/OutputFormat.Default.cpp b/OutputFormat/OutputFormat.Default.cpp
index 347997c..d7225d8 100644
--- a/OutputFormat/OutputFormat.Default.cpp
+++ b/OutputFormat/OutputFormat.Default.cpp
@@ -3,6 +3,7 @@
 #include <Groundfloor/Materials/FileWriter.h>
 #include <regex>
 #include <cmath>
+#include <cstdint>
 
 const char *c_OutputDefaultTimestampNotation = "%Y-%m-%d %H:%M:%S";
 
diff --git a/OutputFormat/OutputFormat.EDL.cpp b/OutputFormat/OutputFormat.EDL.cpp
index be6e3aa..6b7728b 100644
--- a/OutputFormat/OutputFormat.EDL.cpp
+++ b/OutputFormat/OutputFormat.EDL.cpp
@@ -2,6 +2,7 @@
 #include <Groundfloor/Materials/FileWriter.h>
 #include <algorithm>
 #include <cmath>
+#include <cstdint>
 
 const int reelnameMaxlength = 5;