diff --git a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
index 337423cfb96cb..56a3474692720 100644
--- a/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/BUILD.bazel
@@ -3471,6 +3471,14 @@ libc_math_function(
     ],
 )
 
+libc_math_function(
+    name = "hypotf16",
+    additional_deps = [
+        ":__support_fputil_multiply_add",
+        ":__support_fputil_sqrt",
+    ],
+)
+
 libc_math_function(name = "ilogb")
 
 libc_math_function(name = "ilogbf")
diff --git a/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl b/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl
index 41a706d2d92fb..a7acd6159afac 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl
+++ b/utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl
@@ -62,7 +62,8 @@ def libc_test(
         name = name,
         local_defines = local_defines + LIBC_CONFIGURE_OPTIONS,
         deps = deps,
-        copts = copts + libc_common_copts(),
+        # For complex floating point literals.
+        copts = copts + libc_common_copts() + ["-fext-numeric-literals"],
         linkstatic = 1,
         **kwargs
     )
diff --git a/utils/bazel/llvm-project-overlay/libc/test/src/math/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/src/math/BUILD.bazel
index d20922df1b8b5..7f119e3e9b637 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/src/math/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/src/math/BUILD.bazel
@@ -286,6 +286,13 @@ math_mpfr_test(
     ],
 )
 
+math_mpfr_test(
+    name = "hypotf16",
+    hdrs = [
+        "HypotTest.h",
+    ],
+)
+
 math_mpfr_test(
     name = "llrint",
     hdrs = ["RoundToIntegerTest.h"],
diff --git a/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel
index 4df1c4508d764..6d9d1d6a33255 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/src/math/smoke/BUILD.bazel
@@ -898,6 +898,11 @@ math_test(
     hdrs = ["HypotTest.h"],
 )
 
+math_test(
+    name = "hypotf16",
+    hdrs = ["HypotTest.h"],
+)
+
 math_test(
     name = "ilogb",
     hdrs = ["ILogbTest.h"],