1 files changed, 1 insertions, 2 deletions

diff --git a/src/lib/libcrypto/comp/c_rle.c b/src/lib/libcrypto/comp/c_rle.c
index efd366fa22..18bceae51e 100644
--- a/src/lib/libcrypto/comp/c_rle.c
+++ b/src/lib/libcrypto/comp/c_rle.c
@@ -46,7 +46,7 @@ static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
         {
         int i;
 
-        if (olen < (ilen-1))
+        if (ilen == 0 || olen < (ilen-1))
                 {
                 /* ZZZZZZZZZZZZZZZZZZZZZZ */
                 return(-1);
@@ -59,4 +59,3 @@ static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
                 }
         return(ilen-1);
         }
-