diff --git a/sys/build.rs b/sys/build.rs
index c904f17..30d3b24 100644
--- a/sys/build.rs
+++ b/sys/build.rs
@@ -989,7 +989,7 @@ fn main() {
     let mut builder = bindgen::Builder::default()
         .clang_args(clang_includes)
         .ctypes_prefix("libc")
-        // https://github.com/servo/rust-bindgen/issues/550
+        // https://github.com/rust-lang/rust-bindgen/issues/550
         .blacklist_type("max_align_t")
         // these are never part of ffmpeg API
         .blacklist_function("_.*")
@@ -1008,12 +1008,14 @@ fn main() {
         .blacklist_function("coshl")
         .blacklist_function("cosl")
         .blacklist_function("dreml")
+        .blacklist_function("ecvt_r")
         .blacklist_function("erfcl")
         .blacklist_function("erfl")
         .blacklist_function("exp2l")
         .blacklist_function("expl")
         .blacklist_function("expm1l")
         .blacklist_function("fabsl")
+        .blacklist_function("fcvt_r")
         .blacklist_function("fdiml")
         .blacklist_function("finitel")
         .blacklist_function("floorl")
@@ -1050,6 +1052,11 @@ fn main() {
         .blacklist_function("nexttowardf")
         .blacklist_function("nexttowardl")
         .blacklist_function("powl")
+        .blacklist_function("qecvt")
+        .blacklist_function("qecvt_r")
+        .blacklist_function("qfcvt")
+        .blacklist_function("qfcvt_r")
+        .blacklist_function("qgcvt")
         .blacklist_function("remainderl")
         .blacklist_function("remquol")
         .blacklist_function("rintl")