diff --git a/sections/cper-section-pci-bus.h b/sections/cper-section-pci-bus.h
index e0e1bbb..ab44b53 100644
--- a/sections/cper-section-pci-bus.h
+++ b/sections/cper-section-pci-bus.h
@@ -13,5 +13,6 @@
     "Master Data Parity Error", "Address Parity Error", "Command Parity Error"}
 
 json_object* cper_section_pci_bus_to_ir(void* section, EFI_ERROR_SECTION_DESCRIPTOR* descriptor);
+void ir_section_pci_bus_to_cper(json_object* section, FILE* out);
 
 #endif
\ No newline at end of file