diff --git a/libc-test/semver/windows.txt b/libc-test/semver/windows.txt
index ade72529e28e4..ddb97a8d8ea43 100644
--- a/libc-test/semver/windows.txt
+++ b/libc-test/semver/windows.txt
@@ -199,6 +199,7 @@ fgets
 fileno
 fopen
 fpos_t
+fprintf
 fputc
 fputs
 fread
@@ -257,6 +258,7 @@ pclose
 perror
 pipe
 popen
+printf
 ptrdiff_t
 putchar
 puts
diff --git a/src/windows/mod.rs b/src/windows/mod.rs
index 8ecff3ca7ef99..08cba4edd094b 100644
--- a/src/windows/mod.rs
+++ b/src/windows/mod.rs
@@ -319,6 +319,8 @@ extern "C" {
     pub fn feof(stream: *mut FILE) -> c_int;
     pub fn ferror(stream: *mut FILE) -> c_int;
     pub fn perror(s: *const c_char);
+    pub fn printf(format: *const c_char, ...) -> ::c_int;
+    pub fn fprintf(stream: *mut FILE, format: *const c_char, ...) -> ::c_int;
     pub fn atoi(s: *const c_char) -> c_int;
     pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
     pub fn strtof(s: *const c_char, endp: *mut *mut c_char) -> c_float;