diff --git a/python-multiplatform-gradle-plugin/src/main/kotlin/python/multiplatform/gradle/CPythonIncludeDirectories.kt b/python-multiplatform-gradle-plugin/src/main/kotlin/python/multiplatform/gradle/CPythonIncludeDirectories.kt
index 009e0916..5b486239 100644
--- a/python-multiplatform-gradle-plugin/src/main/kotlin/python/multiplatform/gradle/CPythonIncludeDirectories.kt
+++ b/python-multiplatform-gradle-plugin/src/main/kotlin/python/multiplatform/gradle/CPythonIncludeDirectories.kt
@@ -53,7 +53,9 @@ object CPythonIncludeLayout {
                 "$dir/python/include/python$tag"
             }
             in androidTargets -> "$target/prefix/include/python$tag"
-            else -> "ios/Python.xcframework/$target/include/python$tag"
+            // The framework's own Headers, which is also what the library's iOS cinterop reads: the
+            // 3.15 iOS support archive no longer ships `<abi>/include/python3.15` beside it (#313).
+            else -> "ios/Python.xcframework/$target/Python.framework/Headers"
         }
     }
 
diff --git a/python-multiplatform-gradle-plugin/src/test/kotlin/python/multiplatform/gradle/CPythonIncludeDirectoriesTest.kt b/python-multiplatform-gradle-plugin/src/test/kotlin/python/multiplatform/gradle/CPythonIncludeDirectoriesTest.kt
index 971905c6..b7b19954 100644
--- a/python-multiplatform-gradle-plugin/src/test/kotlin/python/multiplatform/gradle/CPythonIncludeDirectoriesTest.kt
+++ b/python-multiplatform-gradle-plugin/src/test/kotlin/python/multiplatform/gradle/CPythonIncludeDirectoriesTest.kt
@@ -22,8 +22,13 @@ class CPythonIncludeDirectoriesTest {
         assertEquals("linux-x86_64-freethreaded/python/include/python3.14t", l.relativePath("linux-x86_64", CPythonFlavour.FREE_THREADED, version))
         assertEquals("windows-x86_64/python/include", l.relativePath("windows-x86_64", CPythonFlavour.GIL, version))
         assertEquals("windows-x86_64-freethreaded/python/include", l.relativePath("windows-x86_64", CPythonFlavour.FREE_THREADED, version))
+        // #313: the 3.15 iOS archive has headers only inside the framework.
+        assertEquals("ios/Python.xcframework/ios-arm64/Python.framework/Headers", l.relativePath("ios-arm64", CPythonFlavour.GIL, version))
+        assertEquals(
+            "ios/Python.xcframework/ios-arm64_x86_64-simulator/Python.framework/Headers",
+            l.relativePath("ios-arm64_x86_64-simulator", CPythonFlavour.GIL, version),
+        )
         assertEquals("android-aarch64/prefix/include/python3.14", l.relativePath("android-aarch64", CPythonFlavour.GIL, version))
-        assertEquals("ios/Python.xcframework/ios-arm64/include/python3.14", l.relativePath("ios-arm64", CPythonFlavour.GIL, version))
     }
 
     @Test