diff --git a/Makefile.am b/Makefile.am
index 7fc8ebc..8f07ae2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -10,11 +10,13 @@ AM_CFLAGS = \
 lib_LIBRARIES = libkernaux.a
 
 TESTS = \
+	tests/test_printf \
 	tests/test_stdlib
 
 noinst_PROGRAMS = $(TESTS)
 
 libkernaux_a_SOURCES = \
+	src/printf.c \
 	src/stdlib.c
 
 if ARCH_X86
@@ -83,6 +85,10 @@ tests_test_pfa_SOURCES = \
 	$(libkernaux_a_SOURCES) \
 	tests/test_pfa.c
 
+tests_test_printf_SOURCES = \
+	$(libkernaux_a_SOURCES) \
+	tests/test_printf.c
+
 tests_test_stdlib_SOURCES = \
 	$(libkernaux_a_SOURCES) \
 	tests/test_stdlib.c
diff --git a/README.md b/README.md
index 6876262..09b2e94 100644
--- a/README.md
+++ b/README.md
@@ -27,11 +27,12 @@ API
 * [Page Frame Allocator](/include/kernaux/pfa.h) *(work in progress)*
 * ELF utils *(planned)*
 * [Architecture-specific helpers](/include/kernaux/arch/)
-* [stdlib replacement](/include/kernaux/stdlib.h) (with prefix):
+* [printf replacement](/include/kernaux/printf.h) *(work in progress)*
+* [stdlib replacement](/include/kernaux/stdlib.h):
   * `memset`
   * `strlen`
   * `strncpy`
-  * `itoa` *(incomplete)*
+  * `itoa` *(work in progress)*
 
 
 
diff --git a/configure.ac b/configure.ac
index 6c1a151..43a2646 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,6 @@ AC_PROG_CC_C99
 AC_PROG_RANLIB
 AC_C_INLINE
 AC_CHECK_HEADER_STDBOOL
-AC_CHECK_HEADERS([stddef.h])
+AC_CHECK_HEADERS([stdarg.h stddef.h])
 
 AC_OUTPUT
diff --git a/include/Makefile.am b/include/Makefile.am
index 7f41fc3..ad88137 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -4,4 +4,5 @@ nobase_include_HEADERS = \
 	kernaux/console.h \
 	kernaux/multiboot2.h \
 	kernaux/pfa.h \
+	kernaux/printf.h \
 	kernaux/stdlib.h
diff --git a/include/kernaux/printf.h b/include/kernaux/printf.h
new file mode 100644
index 0000000..09da72c
--- /dev/null
+++ b/include/kernaux/printf.h
@@ -0,0 +1,17 @@
+#ifndef KERNAUX_INCLUDED_PRINTF
+#define KERNAUX_INCLUDED_PRINTF 1
+
+#include <stdarg.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void kernaux_printf(void (*putchar)(char), const char *format, ...);
+void kernaux_printf_va(void (*putchar)(char), const char *format, va_list va);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/printf.c b/src/printf.c
new file mode 100644
index 0000000..2f9ef8d
--- /dev/null
+++ b/src/printf.c
@@ -0,0 +1,19 @@
+#include "config.h"
+
+#include <kernaux/printf.h>
+#include <kernaux/stdlib.h>
+
+void kernaux_printf(void (*putchar)(char), const char *format, ...)
+{
+    va_list va;
+    va_start(va, format);
+    kernaux_printf_va(putchar, format, va);
+    va_end(va);
+}
+
+void kernaux_printf_va(
+    void (*const putchar)(char),
+    const char *format,
+    va_list va
+) {
+}
diff --git a/tests/test_printf b/tests/test_printf
new file mode 100755
index 0000000..3584e9c
Binary files /dev/null and b/tests/test_printf differ
diff --git a/tests/test_printf.c b/tests/test_printf.c
new file mode 100644
index 0000000..5df8faf
--- /dev/null
+++ b/tests/test_printf.c
@@ -0,0 +1,6 @@
+#include <kernaux/printf.h>
+
+int main()
+{
+    return 0;
+}