diff --git a/sections/cper-section-dmar-iommu.h b/sections/cper-section-dmar-iommu.h
index b86b640..eaac1ae 100644
--- a/sections/cper-section-dmar-iommu.h
+++ b/sections/cper-section-dmar-iommu.h
@@ -5,5 +5,6 @@
 #include "../edk/Cper.h"
 
 json_object* cper_section_dmar_iommu_to_ir(void* section, EFI_ERROR_SECTION_DESCRIPTOR* descriptor);
+void ir_section_dmar_iommu_to_cper(json_object* section, FILE* out);
 
 #endif
\ No newline at end of file