diff --git a/src/common/android/include/link.h b/src/common/android/include/link.h
index e7ff8e2d..4324629d 100644
--- a/src/common/android/include/link.h
+++ b/src/common/android/include/link.h
@@ -34,10 +34,16 @@
    Provide custom version here. */
 #include_next <link.h>
 
-// TODO(rmcilroy): Remove this file once the ndk is updated for other
-// architectures - crbug.com/358831
-#if !defined(__aarch64__) && !defined(__x86_64__) && \
-    !(defined(__mips__) && _MIPS_SIM == _ABI64)
+#include <android/api-level.h>
+
+// TODO(rmcilroy): Remove this file once the NDK API level is updated to at
+// least 21 for all architectures. https://crbug.com/358831
+
+// These structures are only present in traditional headers at API level 21 and
+// above. Unified headers define these structures regardless of the chosen API
+// level. __ANDROID_API_N__ is a proxy for determining whether unified headers
+// are in use. It’s only defined by unified headers.
+#if __ANDROID_API__ < 21 && !defined(__ANDROID_API_N__)
 
 #ifdef __cplusplus
 extern "C" {
@@ -66,6 +72,6 @@ struct link_map {
 }  // extern "C"
 #endif  // __cplusplus
 
-#endif  // !defined(__aarch64__) && !defined(__x86_64__)
+#endif  // __ANDROID_API__ < 21 && !defined(__ANDROID_API_N__)
 
 #endif /* GOOGLE_BREAKPAD_ANDROID_INCLUDE_LINK_H */
diff --git a/src/common/android/include/sys/user.h b/src/common/android/include/sys/user.h
index 1eb02a57..5a9ba053 100644
--- a/src/common/android/include/sys/user.h
+++ b/src/common/android/include/sys/user.h
@@ -34,52 +34,32 @@
 // glibc) and therefore avoid doing otherwise awkward #ifdefs in the code.
 // The following quirks are currently handled by this file:
 // - i386: Use the Android NDK but alias user_fxsr_struct > user_fpxregs_struct.
-// - aarch64:
-//   - NDK r10: Add missing user_regs_struct and user_fpsimd_struct structs.
-//   - NDK r11+: Add missing <stdint.h> include
-// - Other platforms: Just use the Android NDK unchanged.
 
 // TODO(primiano): remove these changes after Chromium has stably rolled to
-// an NDK with the appropriate fixes.
-
-#if defined(ANDROID_NDK_MAJOR_VERSION) && ANDROID_NDK_MAJOR_VERSION > 10
-#ifdef __aarch64__
-#include <stdint.h>
-#endif  // __aarch64__
-#endif  // defined(ANDROID_NDK_MAJOR_VERSION) && ANDROID_NDK_MAJOR_VERSION > 10
+// an NDK with the appropriate fixes. https://crbug.com/358831
 
 #include_next <sys/user.h>
 
-#ifdef __i386__
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-typedef struct user_fxsr_struct user_fpxregs_struct;
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-#endif  // __i386__
+#include <android/api-level.h>
 
-#if !defined(ANDROID_NDK_MAJOR_VERSION) || ANDROID_NDK_MAJOR_VERSION == 10
-#ifdef __aarch64__
 #ifdef __cplusplus
 extern "C" {
 #endif  // __cplusplus
-struct user_regs_struct {
- __u64 regs[31];
- __u64 sp;
- __u64 pc;
- __u64 pstate;
-};
-struct user_fpsimd_struct {
- __uint128_t vregs[32];
- __u32 fpsr;
- __u32 fpcr;
-};
+
+#if defined(__i386__)
+#if __ANDROID_API__ < 21 && !defined(__ANDROID_API_N__)
+
+// user_fpxregs_struct was called user_fxsr_struct in traditional headers before
+// API level 21. Unified headers call it user_fpxregs_struct regardless of the
+// chosen API level. __ANDROID_API_N__ is a proxy for determining whether
+// unified headers are in use. It’s only defined by unified headers.
+typedef struct user_fxsr_struct user_fpxregs_struct;
+
+#endif  // __ANDROID_API__ < 21 && !defined(__ANDROID_API_N__)
+#endif  // defined(__i386__)
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif  // __cplusplus
-#endif  // __aarch64__
-#endif  // defined(ANDROID_NDK_VERSION) && ANDROID_NDK_MAJOR_VERSION == 10
 
 #endif  // GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_SYS_USER_H