diff --git a/arch/mips/include/asm/mach-generic/dma-coherence.h b/arch/mips/include/asm/mach-generic/dma-coherence.h
index 671330928e67..0f8a354fd468 100644
--- a/arch/mips/include/asm/mach-generic/dma-coherence.h
+++ b/arch/mips/include/asm/mach-generic/dma-coherence.h
@@ -52,9 +52,11 @@ static inline int plat_device_is_coherent(struct device *dev)
 	return coherentio;
 }
 
+#ifndef plat_post_dma_flush
 static inline void plat_post_dma_flush(struct device *dev)
 {
 }
+#endif
 
 #ifdef CONFIG_SWIOTLB
 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)