diff --git a/tests/single_linked_list_tests.c b/tests/single_linked_list_tests.c
index c707f08..77d1b4a 100644
--- a/tests/single_linked_list_tests.c
+++ b/tests/single_linked_list_tests.c
@@ -1,7 +1,7 @@
 /* Include statements. */
 #include <stdio.h>
 #include <assert.h>
-#include "../linked_lists/single_linked_list.c"
+#include "../linked_lists/single_linked_list.h"
 
 /* Define constants. */
 #define PRINT_INFO_TESTING_START		"Starting tests.\n"