diff --git a/dcapi/boinc/common_defs.h b/dcapi/boinc/common_defs.h
new file mode 100644
index 0000000000..b582857bb2
--- /dev/null
+++ b/dcapi/boinc/common_defs.h
@@ -0,0 +1,16 @@
+/* Definitions common for both the server and client side */
+#ifndef COMMON_DEFS_H
+#define COMMON_DEFS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SUBRESULT_PFX		"_dc_subresult_"
+#define CKPT_LABEL		"_dc_checkpoint"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* COMMON_DEFS_H */