diff --git a/lib/Makefile.mingw b/lib/Makefile.mingw
index 8a0302b5ee..6be188dce7 100644
--- a/lib/Makefile.mingw
+++ b/lib/Makefile.mingw
@@ -59,6 +59,7 @@ LIB_OBJ = app_ipc.o \
 	mem_usage.o \
 	mfile.o \
 	miofile.o \
+	opencl_boinc.o \
 	procinfo_win.o \
 	procinfo.o \
 	proc_control.o \