diff --git a/crypto/ui/ui_lib.c b/crypto/ui/ui_lib.c
index 167da002d24c7197b85e0bef250cf84b98ec973a..41bc926ca4c6ec15a2901d3177a89bbbd5e68540 100644
--- a/crypto/ui/ui_lib.c
+++ b/crypto/ui/ui_lib.c
@@ -431,6 +431,8 @@ char *UI_construct_prompt(UI *ui, const char *object_desc,
 		len += sizeof(prompt3) - 1;
 
 		prompt = (char *)OPENSSL_malloc(len + 1);
+		if (prompt == NULL)
+			return NULL;
 		BUF_strlcpy(prompt, prompt1, len + 1);
 		BUF_strlcat(prompt, object_desc, len + 1);
 		if (object_name)