diff --git a/win32.mak b/win32.mak
index 092b4ca22c1..e25a35a51a7 100644
--- a/win32.mak
+++ b/win32.mak
@@ -446,6 +446,9 @@ $(IMPDIR)\core\sys\freebsd\sys\link_elf.d : src\core\sys\freebsd\sys\link_elf.d
 $(IMPDIR)\core\sys\freebsd\sys\mman.d : src\core\sys\freebsd\sys\mman.d
 	copy $** $@
 
+$(IMPDIR)\core\sys\freebsd\sys\mount.d : src\core\sys\freebsd\sys\mount.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\dragonflybsd\dlfcn.d : src\core\sys\dragonflybsd\dlfcn.d
 	copy $** $@
 
diff --git a/win64.mak b/win64.mak
index c1c193885b9..96beaa63467 100644
--- a/win64.mak
+++ b/win64.mak
@@ -457,6 +457,9 @@ $(IMPDIR)\core\sys\freebsd\sys\link_elf.d : src\core\sys\freebsd\sys\link_elf.d
 $(IMPDIR)\core\sys\freebsd\sys\mman.d : src\core\sys\freebsd\sys\mman.d
 	copy $** $@
 
+$(IMPDIR)\core\sys\freebsd\sys\mount.d : src\core\sys\freebsd\sys\mount.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\dragonflybsd\dlfcn.d : src\core\sys\dragonflybsd\dlfcn.d
 	copy $** $@