diff --git a/test/SerialIOTest.cpp b/test/SerialIOTest.cpp
index 5cf48f8eb8..aa3de84b43 100644
--- a/test/SerialIOTest.cpp
+++ b/test/SerialIOTest.cpp
@@ -417,7 +417,7 @@ TEST_CASE("multiple_series_handles_test", "[serial]")
     /*
      * clang also understands these pragmas.
      */
-#if defined(__GNUC__MINOR__) || defined(__clang__)
+#if defined(__GNUC_MINOR__) || defined(__clang__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif