diff --git a/common/jpeg/simd/jsimd_x86_64.c b/common/jpeg/simd/jsimd_x86_64.c
index 4c1ef7d..0da564c 100644
--- a/common/jpeg/simd/jsimd_x86_64.c
+++ b/common/jpeg/simd/jsimd_x86_64.c
@@ -24,7 +24,7 @@
  * In the PIC cases, we have no guarantee that constants will keep
  * their alignment. This macro allows us to verify it at runtime.
  */
-#define IS_ALIGNED(ptr, order) (((unsigned)ptr & ((1 << order) - 1)) == 0)
+#define IS_ALIGNED(ptr, order) (((unsigned long)ptr & ((1 << order) - 1)) == 0)
 
 #define IS_ALIGNED_SSE(ptr) (IS_ALIGNED(ptr, 4)) /* 16 byte alignment */
 
diff --git a/common/jpeg/simd/nasm_lt.sh b/common/jpeg/simd/nasm_lt.sh
index 68893b7..b112862 100755
--- a/common/jpeg/simd/nasm_lt.sh
+++ b/common/jpeg/simd/nasm_lt.sh
@@ -12,7 +12,7 @@
             fi
             ;;
         -f|-fbin|-faout|-faoutb|-fcoff|-felf|-felf64|-fas86| \
-        -fobj|-fwin32|-frdf|-fieee|-fmacho)
+        -fobj|-fwin32|-frdf|-fieee|-fmacho|-fmacho64)
             # it's a file format specifier for nasm.
             command="$command $1"
             ;;