diff --git a/platform.h b/platform.h
index 8d5f37e..4d45c5f 100644
--- a/platform.h
+++ b/platform.h
@@ -11,7 +11,7 @@
  */
 
 #define LARGE_INT_POWER_OF_TEN 1000000000   /* the largest power of ten which fits in an int on this architecture */
-#ifdef __hppa__
+#if defined(__hppa__) || defined(__sparc__)
 #define ALIGN_TYPE double                   /* the data type to use for alignment */
 #else
 #define ALIGN_TYPE void *                   /* the data type to use for alignment */