diff --git a/board/gdsys/p1022/controlcenterd.c b/board/gdsys/p1022/controlcenterd.c
index 64d90dd..2f98e47 100644
--- a/board/gdsys/p1022/controlcenterd.c
+++ b/board/gdsys/p1022/controlcenterd.c
@@ -57,6 +57,8 @@
 	u32 versions;		/* 0x0004 */
 	u32 fpga_version;	/* 0x0008 */
 	u32 fpga_features;	/* 0x000c */
+	u32 reserved[4];	/* 0x0010 */
+	u32 control;		/* 0x0020 */
 };
 
 #ifndef CONFIG_TRAILBLAZER
@@ -384,6 +386,9 @@
 		fpga = pci_map_bar(devno, PCI_BASE_ADDRESS_0,
 			PCI_REGION_MEM);
 
+		/* disable sideband clocks */
+		writel(1, &fpga->control);
+
 		versions = readl(&fpga->versions);
 		fpga_version = readl(&fpga->fpga_version);
 		fpga_features = readl(&fpga->fpga_features);