diff --git a/Makefile b/Makefile
index 51c5a7c..20d4f71 100644
--- a/Makefile
+++ b/Makefile
@@ -61,9 +61,9 @@ clean:
 run: decimal-to-earth
 	./decimal-to-earth 21
 
-.PHONY: mem mem1 mem2 mem3
+.PHONY: mem mem1 mem2 mem3 mem4
 mem:
-	echo "the memory make rules are: mem1 mem2 mem3"
+	echo "the memory make rules are: mem1 mem2 mem3 mem4"
 
 mem1: decimal-to-earth
 	valgrind --leak-check=full --show-leak-kinds=all -s decimal-to-earth 999
@@ -74,6 +74,9 @@ mem2: decimal-to-earth
 mem3: decimal-to-earth
 	valgrind --leak-check=full --show-leak-kinds=all -s decimal-to-earth abc
 
+mem4: decimal-to-earth
+	valgrind --leak-check=full --show-leak-kinds=all -s decimal-to-earth 2 3
+
 
 decimal-to-earth_test-1: $(DEP)
 	$(CC) $(CFLAGS) -DFROM_NUMERICALS=\"0123456789\" -DFROM_FIRST_NUMBER_VOID -DFROM_INFINITE_BASE -DTO_NUMERICALS=\"12345\" -o $@ $^
diff --git a/numericx.c b/numericx.c
index 9b3b8c3..d14fb4c 100644
--- a/numericx.c
+++ b/numericx.c
@@ -545,8 +545,9 @@ numericx_translate(char* from, bool from_units_on_the_end, bool from_first_numbe
  *
  * @param argv[] - one number as a string
  *
- * @return EXIT_SUCCESS in case of a successful number translation
+ * @return E2BIG in case of wrong number of arguments
  * @return EXIT_FAILURE in case of unsuccessful number translation
+ * @return EXIT_SUCCESS in case of a successful number translation
  */
 int
 main(int argc, char* argv[])
@@ -555,7 +556,7 @@ main(int argc, char* argv[])
 	if( !(argc == 2) )
 	{
 		fprintf(stderr, "usage: %s <number>\n", PROG_NAME);
-		exit(EXIT_FAILURE);
+		return E2BIG;
 	}
 
 	/* Number variables to be converted */