diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
index e851d23e91eb..28d53cb7b5a2 100644
--- a/include/linux/dma-debug.h
+++ b/include/linux/dma-debug.h
@@ -83,7 +83,7 @@ extern void debug_dma_dump_mappings(struct device *dev);
 
 #else /* CONFIG_DMA_API_DEBUG */
 
-void dma_debug_add_bus(struct bus_type *bus)
+static inline void dma_debug_add_bus(struct bus_type *bus)
 {
 }