diff --git a/src/cpu/x86/lapic/lapic_cpu_init.c b/src/cpu/x86/lapic/lapic_cpu_init.c
index 29f3724b18..d4718c60cc 100644
--- a/src/cpu/x86/lapic/lapic_cpu_init.c
+++ b/src/cpu/x86/lapic/lapic_cpu_init.c
@@ -241,7 +241,7 @@ static void *stacks[CONFIG_MAX_CPUS];
 volatile unsigned long secondary_stack;
 volatile unsigned int secondary_cpu_index;
 
-int start_cpu(struct device *cpu)
+static int start_cpu(struct device *cpu)
 {
 	struct cpu_info *info;
 	uintptr_t stack_top;
diff --git a/src/include/cpu/x86/lapic.h b/src/include/cpu/x86/lapic.h
index 717fc9aa38..ab2843f69a 100644
--- a/src/include/cpu/x86/lapic.h
+++ b/src/include/cpu/x86/lapic.h
@@ -139,7 +139,4 @@ static inline void setup_lapic(void)
 		disable_lapic();
 }
 
-struct device;
-int start_cpu(struct device *cpu);
-
 #endif /* CPU_X86_LAPIC_H */