diff --git a/src/northbridge/intel/gm45/gm45.h b/src/northbridge/intel/gm45/gm45.h
index 258809f..34f734c 100644
--- a/src/northbridge/intel/gm45/gm45.h
+++ b/src/northbridge/intel/gm45/gm45.h
@@ -436,6 +436,13 @@
 
 void init_iommu(void);
 
+struct blc_pwm_t {
+	char ascii_string[13];
+	int pwm_freq; /* In Hz */
+};
+int get_blc_values(const struct blc_pwm_t **entries);
+
+
 #if ENV_RAMSTAGE && !defined(__SIMPLE_DEVICE__)
 #include <device/device.h>