diff --git a/src/Functions/FunctionFactory.h b/src/Functions/FunctionFactory.h
index dd7d19d8d07..bac55dade16 100644
--- a/src/Functions/FunctionFactory.h
+++ b/src/Functions/FunctionFactory.h
@@ -3,7 +3,6 @@
 #include <Interpreters/Context_fwd.h>
 #include <Common/IFactoryWithAliases.h>
 #include <Functions/IFunction.h>
-#include <Functions/IFunction.h>
 #include <Functions/IFunctionAdaptors.h>
 
 #include <functional>