diff --git a/src/lib.rs b/src/lib.rs
index 602609d..db73f62 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -562,6 +562,12 @@ impl Config {
             if !self.defined("CMAKE_SYSTEM_NAME") {
                 cmd.arg("-DCMAKE_SYSTEM_NAME=SunOS");
             }
+        } else if target.contains("apple-ios") || target.contains("apple-tvos") {
+            // These two flags prevent CMake from adding an OSX sysroot, which messes up compilation.
+            if !self.defined("CMAKE_OSX_SYSROOT") && !self.defined("CMAKE_OSX_DEPLOYMENT_TARGET") {
+                cmd.arg("-DCMAKE_OSX_SYSROOT=/");
+                cmd.arg("-DCMAKE_OSX_DEPLOYMENT_TARGET=");
+            }
         }
         if let Some(ref generator) = self.generator {
             cmd.arg("-G").arg(generator);