diff --git a/dumpimage.c b/dumpimage.c
index 2cc871023ac8a787ea0edf597d3e74e433559ad3..6fdc4cd32df83c8cf570c9a809ae90c3ea67cbbc 100644
--- a/dumpimage.c
+++ b/dumpimage.c
@@ -32,4 +32,9 @@
 int main(int argc, char *argv[])
 {
 	printf("dumpimage\n");
+
+	if (argc < 2) {
+		fprintf(stderr, "Error: missing filename");
+		return -1;
+	}
 }