diff --git a/dev/x86_64/src/align.h b/dev/x86_64/src/align.h
index 401f50f68..052242a34 100644
--- a/dev/x86_64/src/align.h
+++ b/dev/x86_64/src/align.h
@@ -10,19 +10,9 @@
  * https://github.com/pq-crystals/kyber/blob/main/avx2/align.h
  */
 
-#ifndef ALIGN_H
-#define ALIGN_H
-
 #include <immintrin.h>
 #include <stdint.h>
 
-#define ALIGNED_UINT8(N)        \
-  union                         \
-  {                             \
-    uint8_t coeffs[N];          \
-    __m256i vec[(N + 31) / 32]; \
-  }
-
 #define ALIGNED_INT16(N)        \
   union                         \
   {                             \
@@ -30,6 +20,4 @@
     __m256i vec[(N + 15) / 16]; \
   }
 
-#endif
-
 #endif /* MLK_DEV_X86_64_SRC_ALIGN_H */
diff --git a/mlkem/native/x86_64/src/align.h b/mlkem/native/x86_64/src/align.h
index 15c4543d8..ec18d1023 100644
--- a/mlkem/native/x86_64/src/align.h
+++ b/mlkem/native/x86_64/src/align.h
@@ -10,19 +10,9 @@
  * https://github.com/pq-crystals/kyber/blob/main/avx2/align.h
  */
 
-#ifndef ALIGN_H
-#define ALIGN_H
-
 #include <immintrin.h>
 #include <stdint.h>
 
-#define ALIGNED_UINT8(N)        \
-  union                         \
-  {                             \
-    uint8_t coeffs[N];          \
-    __m256i vec[(N + 31) / 32]; \
-  }
-
 #define ALIGNED_INT16(N)        \
   union                         \
   {                             \
@@ -30,6 +20,4 @@
     __m256i vec[(N + 15) / 16]; \
   }
 
-#endif
-
 #endif /* MLK_NATIVE_X86_64_SRC_ALIGN_H */