1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/dh/dh_depr.c b/crypto/dh/dh_depr.c
index 7be6041dc8..de93472189 100644
--- a/crypto/dh/dh_depr.c
+++ b/crypto/dh/dh_depr.c
@@ -72,7 +72,7 @@ DH *DH_generate_parameters(int prime_len, int generator,
     if ((ret = DH_new()) == NULL)
         return NULL;
     cb = BN_GENCB_new();
-    if (!cb) {
+    if (cb == NULL) {
         DH_free(ret);
         return NULL;
     }