diff --git a/src/image_util.cpp b/src/image_util.cpp
index a825c9e91..0dc51f195 100644
--- a/src/image_util.cpp
+++ b/src/image_util.cpp
@@ -52,7 +52,10 @@
 #include <fstream>
 #include <sstream>
 #include <algorithm>
+
+#if __cplusplus >= 201703L
 #include <execution>
+#endif
 
 namespace mapnik
 {