diff --git a/dwarf.c b/dwarf.c
index e5a0cff..c3d5a91 100644
--- a/dwarf.c
+++ b/dwarf.c
@@ -80,17 +80,14 @@ decode_leb128s(u8 *at, s32 *dest)
     
     while (1) {
         byte = at[offset++];
-        
         result |= ((byte & 127) << shift);
-        
+        shift += 7;
         if ((byte & 128) == 0) {
             break;
         }
-        
-        shift += 7;
     }
     
-    if ((shift < size) && (byte & 128)) {
+    if ((shift < size) && (byte & 64)) {
         result |= -(1 << shift);
     }