diff --git a/examples/integrate_function_adapt_simp_ex.cpp b/examples/integrate_function_adapt_simp_ex.cpp
index 58802c550..6d2c8f76b 100644
--- a/examples/integrate_function_adapt_simp_ex.cpp
+++ b/examples/integrate_function_adapt_simp_ex.cpp
@@ -14,7 +14,6 @@
 */
 
 #include <iostream>
-#include <stdint.h>
 #include <dlib/matrix.h>
 #include <dlib/numeric_constants.h>
 #include <dlib/numerical_integration.h>