diff --git a/src/northbridge/intel/gm45/ram_calc.c b/src/northbridge/intel/gm45/ram_calc.c
index af1a46d..c1ef30e 100644
--- a/src/northbridge/intel/gm45/ram_calc.c
+++ b/src/northbridge/intel/gm45/ram_calc.c
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <arch/cpu.h>
 #include <arch/io.h>
+#include <device/pci_ops.h>
 #include <device/pci_def.h>
 #include <console/console.h>
 #include <cpu/intel/romstage.h>