diff --git a/src/decode.c b/src/decode.c
index 93947cfb3..8a7a0f0af 100644
--- a/src/decode.c
+++ b/src/decode.c
@@ -1043,7 +1043,7 @@ bfr_read_32 (void *restrict dst, BITCODE_RC *restrict *restrict src,
              size_t size)
 {
   size_t n;
-  uint32_t *dp, *sp, *dp0, *sp0;
+  uint32_t *dp, *sp, *dp0 = NULL, *sp0 = NULL;
   bool dst_unaligned = false;
   bool src_unaligned = false;
   assert (!(size % 4));