diff --git a/sections/cper-section-dmar-iommu.c b/sections/cper-section-dmar-iommu.c
index 1f08376..99af77c 100644
--- a/sections/cper-section-dmar-iommu.c
+++ b/sections/cper-section-dmar-iommu.c
@@ -13,7 +13,7 @@
 #include <libcper/sections/cper-section-dmar-iommu.h>
 
 //Converts a single IOMMU specific DMAr CPER section into JSON IR.
-json_object *cper_section_dmar_iommu_to_ir(void *section)
+json_object *cper_section_dmar_iommu_to_ir(const void *section)
 {
 	EFI_IOMMU_DMAR_ERROR_DATA *iommu_error =
 		(EFI_IOMMU_DMAR_ERROR_DATA *)section;