diff --git a/src/modules/mc_pos_control/mc_pos_control_tests/test_controlmath.cpp b/src/modules/mc_pos_control/mc_pos_control_tests/test_controlmath.cpp
index 176980bd5b..97aa043a6a 100644
--- a/src/modules/mc_pos_control/mc_pos_control_tests/test_controlmath.cpp
+++ b/src/modules/mc_pos_control/mc_pos_control_tests/test_controlmath.cpp
@@ -69,7 +69,10 @@ bool ControlMathTest::testPrioritizeVector()
 	// v0 already at max
 	matrix::Vector2f v0(max, 0);
 	matrix::Vector2f v1(v0(1), -v0(0));
-	matrix::Vector2f v_r = ControlMath::constrainXY(v0, v1, max);
+
+	// the static keywork is a workaround for an internal bug of GCC
+	// "internal compiler error: in trunc_int_for_mode, at explow.c:55"
+	static matrix::Vector2f v_r = ControlMath::constrainXY(v0, v1, max);
 	ut_assert_true(fabsf(v_r(0)) - max < FLT_EPSILON && v_r(0) > 0.0f);
 	ut_assert_true(fabsf(v_r(1) - 0.0f) < FLT_EPSILON);