diff --git a/src/cpu/x86/mtrr/mtrr.c b/src/cpu/x86/mtrr/mtrr.c
index 8826535528..b19b853196 100644
--- a/src/cpu/x86/mtrr/mtrr.c
+++ b/src/cpu/x86/mtrr/mtrr.c
@@ -772,7 +772,7 @@ void x86_setup_mtrrs(void)
 	x86_setup_var_mtrrs(address_size, 1);
 }
 
-int x86_mtrr_check(void)
+void x86_mtrr_check(void)
 {
 	/* Only Pentium Pro and later have MTRR */
 	msr_t msr;
@@ -795,5 +795,4 @@ int x86_mtrr_check(void)
 	printk(BIOS_DEBUG, "\n");
 
 	post_code(0x93);
-	return ((int) msr.lo);
 }
diff --git a/src/include/cpu/x86/mtrr.h b/src/include/cpu/x86/mtrr.h
index 2a440723b8..95cabf1247 100644
--- a/src/include/cpu/x86/mtrr.h
+++ b/src/include/cpu/x86/mtrr.h
@@ -66,7 +66,7 @@ void enable_fixed_mtrr(void);
 void x86_setup_fixed_mtrrs(void);
 /* Set up fixed MTRRs but do not enable them. */
 void x86_setup_fixed_mtrrs_no_enable(void);
-int x86_mtrr_check(void);
+void x86_mtrr_check(void);
 #endif
 
 #if !defined(__ASSEMBLER__) && defined(__PRE_RAM__) && !defined(__ROMCC__)