diff --git a/Source/cmFileCommand.cxx b/Source/cmFileCommand.cxx
index 7a6e2b7ad8..f78b764b9a 100644
--- a/Source/cmFileCommand.cxx
+++ b/Source/cmFileCommand.cxx
@@ -37,6 +37,7 @@
 #if defined(CMAKE_BUILD_WITH_CMAKE)
 #include "cmCurl.h"
 #include "cmFileLockResult.h"
+#include <cm_curl.h>
 #endif
 
 #if defined(CMAKE_USE_ELF_PARSER)