diff --git a/include/misc/printk.h b/include/misc/printk.h
index 9754686dc80..fdccf5927d0 100644
--- a/include/misc/printk.h
+++ b/include/misc/printk.h
@@ -55,6 +55,8 @@ extern __printf_like(1, 2) int printk(const char *fmt, ...);
 extern __printf_like(3, 4) int snprintk(char *str, size_t size,
 					const char *fmt, ...);
 extern int vsnprintk(char *str, size_t size, const char *fmt, va_list ap);
+
+void _vprintk(int (*out)(int, void *), void *ctx, const char *fmt, va_list ap);
 #else
 static inline __printf_like(1, 2) int printk(const char *fmt, ...)
 {
diff --git a/misc/printk.c b/misc/printk.c
index bb965f49b55..5047fe2021a 100644
--- a/misc/printk.c
+++ b/misc/printk.c
@@ -75,8 +75,7 @@ void __printk_hook_install(int (*fn)(int))
  *
  * @return N/A
  */
-static inline void _vprintk(out_func_t out, void *ctx, const char *fmt,
-			    va_list ap)
+void _vprintk(out_func_t out, void *ctx, const char *fmt, va_list ap)
 {
 	int might_format = 0; /* 1 if encountered a '%' */
 	int pad_zero = 0;