diff --git a/tools/libs/guest/xg_dom_core.c b/tools/libs/guest/xg_dom_core.c
index f846d8e1ed..98ef8e8fc9 100644
--- a/tools/libs/guest/xg_dom_core.c
+++ b/tools/libs/guest/xg_dom_core.c
@@ -31,6 +31,7 @@
 #include <zlib.h>
 #include <assert.h>
 
+#define XG_NEED_UNALIGNED
 #include "xg_private.h"
 #include "_paths.h"
 
@@ -325,7 +326,6 @@ int xc_dom_kernel_check_size(struct xc_dom_image *dom, size_t sz)
 
 size_t xc_dom_check_gzip(xc_interface *xch, void *blob, size_t ziplen)
 {
-    unsigned char *gzlen;
     size_t unziplen;
 
     if ( ziplen < 6 )
@@ -337,8 +337,7 @@ size_t xc_dom_check_gzip(xc_interface *xch, void *blob, size_t ziplen)
         /* not gzipped */
         return 0;
 
-    gzlen = blob + ziplen - 4;
-    unziplen = (size_t)gzlen[3] << 24 | gzlen[2] << 16 | gzlen[1] << 8 | gzlen[0];
+    unziplen = get_unaligned_le32(blob + ziplen - 4);
     if ( unziplen > XC_DOM_DECOMPRESS_MAX )
     {
         xc_dom_printf
diff --git a/tools/libs/guest/xg_dom_decompress_lz4.c b/tools/libs/guest/xg_dom_decompress_lz4.c
index 97ba620d86..34a1a13d84 100644
--- a/tools/libs/guest/xg_dom_decompress_lz4.c
+++ b/tools/libs/guest/xg_dom_decompress_lz4.c
@@ -3,6 +3,7 @@
 #include <inttypes.h>
 #include <stdint.h>
 
+#define XG_NEED_UNALIGNED
 #include "xg_private.h"
 #include "xg_dom_decompress.h"
 
diff --git a/tools/libs/guest/xg_private.h b/tools/libs/guest/xg_private.h
index c3ed8c1257..8f9b257a2f 100644
--- a/tools/libs/guest/xg_private.h
+++ b/tools/libs/guest/xg_private.h
@@ -62,6 +62,15 @@ char *xc_inflate_buffer(xc_interface *xch,
                         unsigned long in_size,
                         unsigned long *out_size);
 
+#if !defined(__MINIOS__) || defined(XG_NEED_UNALIGNED)
+
+static inline unsigned int get_unaligned_le32(const uint8_t *buf)
+{
+    return ((unsigned int)buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+}
+
+#endif /* !__MINIOS__ || XG_NEED_UNALIGNED */
+
 unsigned long csum_page (void * page);
 
 #define _PAGE_PRESENT   0x001
diff --git a/xen/common/lz4/defs.h b/xen/common/lz4/defs.h
index 4fbea2ac3d..10609f5a53 100644
--- a/xen/common/lz4/defs.h
+++ b/xen/common/lz4/defs.h
@@ -18,11 +18,6 @@ static inline u16 get_unaligned_le16(const void *p)
 	return le16_to_cpup(p);
 }
 
-static inline u32 get_unaligned_le32(const void *p)
-{
-	return le32_to_cpup(p);
-}
-
 #endif
 
 /*