1 files changed, 3 insertions, 0 deletions
diff --git a/src/c.zig b/src/c.zig
index a8ac08de3..d43f1b887 100644
--- a/src/c.zig
+++ b/src/c.zig
@@ -449,3 +449,6 @@ pub extern fn set_process_priority(pid: c_uint, priority: c_int) i32;
 
 pub extern fn strncasecmp(s1: [*]const u8, s2: [*]const u8, n: usize) i32;
 pub extern fn memmove(dest: [*]u8, src: [*]const u8, n: usize) void;
+
+// https://man7.org/linux/man-pages/man3/fmod.3.html
+pub extern fn fmod(f64, f64) f64;