diff --git a/arch/arm/include/asm/arch-omap4/clocks.h b/arch/arm/include/asm/arch-omap4/clocks.h
index 374e0642ec37755337378d0bfea9bd36b57ee367..45c947d648fe676119abdc18a068158aa9eef6dd 100644
--- a/arch/arm/include/asm/arch-omap4/clocks.h
+++ b/arch/arm/include/asm/arch-omap4/clocks.h
@@ -679,12 +679,12 @@ struct dpll_regs {
 struct dpll_params {
 	u32 m;
 	u32 n;
-	u8 m2;
-	u8 m3;
-	u8 m4;
-	u8 m5;
-	u8 m6;
-	u8 m7;
+	s8 m2;
+	s8 m3;
+	s8 m4;
+	s8 m5;
+	s8 m6;
+	s8 m7;
 };
 
 #endif /* _CLOCKS_OMAP4_H_ */