diff --git a/src/BMatchingSolver.cpp b/src/BMatchingSolver.cpp
index 9f30c02..33e30eb 100644
--- a/src/BMatchingSolver.cpp
+++ b/src/BMatchingSolver.cpp
@@ -158,7 +158,7 @@ int main(int argc, char ** argv) {
 		/* getopt_long stores the option index here. */
 		int option_index = 0;
 
-		c = getopt_long (argc, argv, "w:d:x:n:b:t:i:o:D:Tc:v",
+		c = getopt_long (argc, argv, "w:d:x:n:b:t:i:o:D:Tc:vB",
 				long_options, &option_index);
 
 		/* Detect the end of the options. */
@@ -235,6 +235,9 @@ int main(int argc, char ** argv) {
 			(n == 0)) {
 		cout << "Invalid options. Exiting..." << endl;
 		return -1;
+	} else if (binary == 1) {
+		cout << "Error: Binary input files are unsupported." << endl;
+		return -1;
 	}
 
 	SparseMatrix<bool> * solution = 0;