diff --git a/CMakeLists.txt b/CMakeLists.txt
index b69df14..35c8379 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,6 @@
 #
 # Set global flags.
 #
-set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED TRUE)
 set(CMAKE_C_EXTENSIONS TRUE)
 
diff --git a/include/transfer_list.h b/include/transfer_list.h
index 333a6b2..1e4bd7b 100644
--- a/include/transfer_list.h
+++ b/include/transfer_list.h
@@ -109,8 +109,20 @@
 	 */
 };
 
-static_assert(sizeof(struct transfer_list_entry) == 0x8U,
-	      "assert_transfer_list_entry_size");
+/*
+ * Provide a backward-compatible implementation of static_assert.
+ * This keyword was introduced in C11, so it may be unavailable in
+ * projects targeting older C standards.
+ */
+#if __STDC_VERSION__ >= 201112L
+#define LIBTL_STATIC_ASSERT(cond, msg) _Static_assert(cond, #msg)
+#else
+#define LIBTL_STATIC_ASSERT(cond, msg) \
+	typedef char static_assertion_##msg[(cond) ? 1 : -1]
+#endif
+
+LIBTL_STATIC_ASSERT(sizeof(struct transfer_list_entry) == 0x8U,
+		    assert_transfer_list_entry_size);
 
 void transfer_list_dump(struct transfer_list_header *tl);
 void transfer_entry_dump(struct transfer_list_entry *te);