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-rw-r--r--crypto/comp/c_zlib.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/comp/c_zlib.c b/crypto/comp/c_zlib.c
index 6a57f70926..f0fc0aff9e 100644
--- a/crypto/comp/c_zlib.c
+++ b/crypto/comp/c_zlib.c
@@ -309,7 +309,9 @@ COMP_METHOD *COMP_zlib(void)
void COMP_zlib_cleanup(void)
{
#ifdef ZLIB_SHARED
- DSO_free(zlib_dso);
+ if (zlib_dso != NULL)
+ DSO_free(zlib_dso);
+ zlib_dso = NULL;
#endif
}