diff --git a/src/ifcparse/IfcParse.cpp b/src/ifcparse/IfcParse.cpp
index 184ae81a8b..403809b5ac 100644
--- a/src/ifcparse/IfcParse.cpp
+++ b/src/ifcparse/IfcParse.cpp
@@ -35,7 +35,6 @@
 #include <boost/variant.hpp>
 #include <boost/math/special_functions/fpclassify.hpp>
 #include <ctime>
-#include <mutex>
 #include <set>
 #include <stdio.h>
 #include <stdlib.h>