diff --git a/aws-lc-fips-sys/builder/cmake_builder.rs b/aws-lc-fips-sys/builder/cmake_builder.rs
index 7a739506cb8..d70aed044d5 100644
--- a/aws-lc-fips-sys/builder/cmake_builder.rs
+++ b/aws-lc-fips-sys/builder/cmake_builder.rs
@@ -249,6 +249,14 @@ impl CmakeBuilder {
                 cmake_cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
                 cmake_cfg.define("CMAKE_OSX_SYSROOT", "macosx");
             }
+            if target_os().trim() == "tvos" {
+                cmake_cfg.define("CMAKE_SYSTEM_NAME", "tvOS");
+                if effective_target().ends_with("-tvos-sim") || target_arch() == "x86_64" {
+                    cmake_cfg.define("CMAKE_OSX_SYSROOT", "appletvsimulator");
+                } else {
+                    cmake_cfg.define("CMAKE_OSX_SYSROOT", "appletvos");
+                }
+            }
         }
 
         if target_os() == "windows" {
diff --git a/aws-lc-fips-sys/builder/main.rs b/aws-lc-fips-sys/builder/main.rs
index 20fc7d3be45..3a8c8d8c3d2 100644
--- a/aws-lc-fips-sys/builder/main.rs
+++ b/aws-lc-fips-sys/builder/main.rs
@@ -744,6 +744,7 @@ fn invoke_external_bindgen(
     if let Some(prefix_str) = &options.build_prefix {
         sym_prefix = if target_os().to_lowercase() == "macos"
             || target_os().to_lowercase() == "ios"
+            || target_os().to_lowercase() == "tvos"
             || (target_os().to_lowercase() == "windows" && target_arch() == "x86")
         {
             format!("_{prefix_str}_")
diff --git a/aws-lc-sys/builder/cmake_builder.rs b/aws-lc-sys/builder/cmake_builder.rs
index e62d50ab58e..87590a3f07f 100644
--- a/aws-lc-sys/builder/cmake_builder.rs
+++ b/aws-lc-sys/builder/cmake_builder.rs
@@ -200,6 +200,14 @@ impl CmakeBuilder {
                 cmake_cfg.define("CMAKE_SYSTEM_NAME", "Darwin");
                 cmake_cfg.define("CMAKE_OSX_SYSROOT", "macosx");
             }
+            if target_os().trim() == "tvos" {
+                cmake_cfg.define("CMAKE_SYSTEM_NAME", "tvOS");
+                if effective_target().ends_with("-tvos-sim") || target_arch() == "x86_64" {
+                    cmake_cfg.define("CMAKE_OSX_SYSROOT", "appletvsimulator");
+                } else {
+                    cmake_cfg.define("CMAKE_OSX_SYSROOT", "appletvos");
+                }
+            }
         }
 
         if target_os() == "android" {
diff --git a/aws-lc-sys/builder/main.rs b/aws-lc-sys/builder/main.rs
index af116581a85..03d3afdefa7 100644
--- a/aws-lc-sys/builder/main.rs
+++ b/aws-lc-sys/builder/main.rs
@@ -915,6 +915,7 @@ fn invoke_external_bindgen(
     if let Some(prefix_str) = prefix {
         sym_prefix = if target_os().to_lowercase() == "macos"
             || target_os().to_lowercase() == "ios"
+            || target_os().to_lowercase() == "tvos"
             || (target_os().to_lowercase() == "windows" && target_arch() == "x86")
         {
             format!("_{prefix_str}_")