diff --git a/stb_image_resize.h b/stb_image_resize.h
index a1949b5..0322743 100644
--- a/stb_image_resize.h
+++ b/stb_image_resize.h
@@ -1,5 +1,3 @@
-#define STBIR_DEBUG_OVERWRITE_TEST
-
 /* stb_image_resize - v0.50 - public domain image resampling
    no warranty implied; use at your own risk
 
@@ -507,7 +505,7 @@ static unsigned char stbir__linear_to_srgb_uchar(float f)
 
 static float stbir__filter_box(float x)
 {
-	if (x < -0.5f)
+	if (x <= -0.5f)
 		return 0;
 	else if (x > 0.5f)
 		return 0;
diff --git a/tests/resample_test.cpp b/tests/resample_test.cpp
index 77d8437..5cc1518 100644
--- a/tests/resample_test.cpp
+++ b/tests/resample_test.cpp
@@ -720,5 +720,3 @@ void test_suite(int argc, char **argv)
 	resize_image("gamma_2.2.jpg", .5f, .5f, STBIR_FILTER_CATMULLROM, STBIR_EDGE_REFLECT, STBIR_COLORSPACE_SRGB, "test-output/gamma_2.2.jpg");
 	resize_image("gamma_dalai_lama_gray.jpg", .5f, .5f, STBIR_FILTER_CATMULLROM, STBIR_EDGE_REFLECT, STBIR_COLORSPACE_SRGB, "test-output/gamma_dalai_lama_gray.jpg");
 }
-
-