diff --git a/src/northbridge/intel/i945/raminit.c b/src/northbridge/intel/i945/raminit.c
index 7b8c84d..47a37ce 100644
--- a/src/northbridge/intel/i945/raminit.c
+++ b/src/northbridge/intel/i945/raminit.c
@@ -1604,7 +1604,8 @@
 static void sdram_program_graphics_frequency(struct sys_info *sysinfo)
 {
 	u8 reg8;
-	u8 freq, second_vco, voltage;
+	u8 freq, voltage;
+	bool second_vco = false;
 
 #define CRCLK_166MHz	0x00
 #define CRCLK_200MHz	0x01
@@ -1680,10 +1681,8 @@
 	else
 		sysinfo->mvco4x = 0;
 
-	second_vco = 0;
-
 	if (voltage == VOLTAGE_1_50) {
-		second_vco = 1;
+		second_vco = true;
 	} else if ((i945_silicon_revision() > 0) && (freq == CRCLK_250MHz)) {
 		u16 mem = sysinfo->memory_frequency;
 		u16 fsb = sysinfo->fsb_frequency;
@@ -1691,17 +1690,14 @@
 		if ((fsb == 667 && mem == 533) ||
 		    (fsb == 533 && mem == 533) ||
 		    (fsb == 533 && mem == 400)) {
-			second_vco = 1;
+			second_vco = true;
 		}
 
 		if (fsb == 667 && mem == 533)
 			sysinfo->mvco4x = 1;
 	}
 
-	if (second_vco)
-		sysinfo->clkcfg_bit7 = 1;
-	else
-		sysinfo->clkcfg_bit7 = 0;
+	sysinfo->clkcfg_bit7 = second_vco;
 
 	/* Graphics Core Render Clock */
 	pci_update_config16(IGD_DEV, GCFC, ~((7 << 0) | (1 << 13)), freq);
diff --git a/src/northbridge/intel/i945/raminit.h b/src/northbridge/intel/i945/raminit.h
index efaedf4..22c4faf 100644
--- a/src/northbridge/intel/i945/raminit.h
+++ b/src/northbridge/intel/i945/raminit.h
@@ -30,7 +30,7 @@
 	bool interleaved;
 
 	u8 mvco4x;		/* 0 (8x) or 1 (4x) */
-	u8 clkcfg_bit7;
+	bool clkcfg_bit7;
 	u8 boot_path;
 #define BOOT_PATH_NORMAL	0
 #define BOOT_PATH_RESET		1