diff --git a/src/caesarcrypt.c b/src/caesarcrypt.c
index 5895192..d15c165 100644
--- a/src/caesarcrypt.c
+++ b/src/caesarcrypt.c
@@ -31,6 +31,11 @@ int main()
 	
 	fputs("Enter your message text: ", stdout);
 	char* msg = dyninput_str(INT64_MAX);
+	if (!msg)
+	{
+		puts("ERROR: String input failed! Exiting...");
+		return -1;
+	}
 
 	fputs("Enter your key (shift value): ", stdout);
 	fgets(buf, 4, stdin);