diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index 56075320b813..f43420b8c573 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -15,7 +15,6 @@ extern dma_addr_t bad_dma_address;
 extern int iommu_merge;
 extern struct device x86_dma_fallback_dev;
 extern int panic_on_overflow;
-extern int force_iommu;
 
 struct dma_mapping_ops {
 	int             (*mapping_error)(struct device *dev,