diff --git a/src/hardware/hw_draw.c b/src/hardware/hw_draw.c
index ee8171b2e..e593677f6 100644
--- a/src/hardware/hw_draw.c
+++ b/src/hardware/hw_draw.c
@@ -294,10 +294,7 @@ void HWR_DrawAffinePatch(patch_t *gpatch, fixed_t x, fixed_t y, const affine_t *
 	// i don't fucking know, i spent a day on this and got absolutely nowhere, but this guy knows:
 	// https://nigeltao.github.io/blog/2021/inverting-3x2-affine-transformation-matrix.html
 	float determinant = fa * fd - fb * fc;
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wfloat-equal"
-	if (determinant == 0.0f)
-#pragma GCC diagnostic pop
+	if (fpclassify(determinant) == FP_ZERO)
 		return;
 	float ba = fd / determinant;
 	float bb = -fb / determinant;