diff --git a/DGL.C b/DGL.C
index 4abd7aa..7c38fea 100644
--- a/DGL.C
+++ b/DGL.C
@@ -58,9 +58,13 @@ void dgl_set_error(DGL_ERROR error) {
     _last_error = error;
 }
 
-void dgl_init(void) {
-    atexit(mouse_shutdown);
-    atexit(keyboard_shutdown);
-    atexit(video_shutdown);
+void _dgl_atexit(void) {
+    mouse_shutdown();
+    keyboard_shutdown();
+    video_shutdown();
+}
+
+void dgl_init(void) {
+    atexit(_dgl_atexit);
 }
 
diff --git a/DGLMATH.H b/DGLMATH.H
index 413b4ce..efaa12a 100644
--- a/DGLMATH.H
+++ b/DGLMATH.H
@@ -61,7 +61,9 @@ static float symmetrical_round(float value) {
 }
 
 static boolean close_enough(float a, float b, float tolerance) {
-    return fabs((a - b) / ((b == 0.0f) ? 1.0f : b)) < tolerance;
+    //return fabs((a - b) / ((b == 0.0f) ? 1.0f : b)) < tolerance;
+    // TODO: this is not the best way
+    return fabs(a - b) <= tolerance;
 }
 
 static boolean power_of_2(int n) {
diff --git a/MAKEFILE b/MAKEFILE
index 1fbc1b2..edb3f2e 100644
--- a/MAKEFILE
+++ b/MAKEFILE
@@ -4,11 +4,11 @@ target_name = dgl
 
 object_files = &
 	dglblit.obj &
-    dglblita.obj &
+	dglblita.obj &
 	dglclip.obj &
 	dgl.obj &
 	dgldraw.obj &
-    dgldrawa.obj &
+	dgldrawa.obj &
 	dglgfx.obj &
 	dglpal.obj &
 	dglkbrd.obj &
@@ -34,7 +34,7 @@ asm_flags = /m /ml $(asm_flags_$(target_config))
 	wcc386 $[. /zq $(cc_flags)
 
 .asm.obj: .AUTODEPEND
-    tasm $[. /t $(asm_flags)
+	tasm $[. /t $(asm_flags)
 
 $(target_name).lbc: $(object_files)
 	%create $^@
@@ -47,6 +47,7 @@ clean : .SYMBOLIC
 	del *.obj
 	del *.err
 	del $(target_name).exe
+	del $(target_name).lib
 	del $(target_name).lnk
 	del $(target_name).lbc
 
diff --git a/TEST/FIXED.C b/TEST/FIXED.C
index 46e06d9..0c06012 100644
--- a/TEST/FIXED.C
+++ b/TEST/FIXED.C
@@ -6,13 +6,14 @@
 void test_fixed(void) {
     fixed a, b, c;
     float af, bf, cf, f;
+    float aaf, bbf, ccf;
     int i;
 
     a = FTOFIX(PI);
     f = FIXTOF(a);
     ASSERT(FFIX_EQU(PI, f));
 
-    a = FTOFIX(-0.37f);
+    a = FTOFIX(-0.38f);
     f = FIXTOF(a);
     ASSERT(FFIX_EQU(-0.38f, f));
 
@@ -57,13 +58,16 @@ void test_fixed(void) {
         f = DEG_TO_RAD(i + 1);
         a = fix_sin(FTOFIX(f));
         af = sin(f);
+        aaf = FIXTOF(a);
         b = fix_cos(FTOFIX(f));
         bf = cos(f);
+        bbf = FIXTOF(b);
         c = fix_tan(FTOFIX(f));
         cf = tan(f);
-        ASSERT(FFIX_EQU(FIXTOF(a), af));
-        ASSERT(FFIX_EQU(FIXTOF(b), bf));
-        ASSERT(FFIX_EQU(FIXTOF(c), cf));
+        ccf = FIXTOF(c);
+        ASSERT(FFIX_EQU(aaf, af));
+        ASSERT(FFIX_EQU(bbf, bf));
+        ASSERT(FFIX_EQU(ccf, cf));
     }
 }
 
diff --git a/TEST/HELPERS.H b/TEST/HELPERS.H
index d33f988..3e3f7b0 100644
--- a/TEST/HELPERS.H
+++ b/TEST/HELPERS.H
@@ -6,12 +6,11 @@
 #include "dgl.h"
 
 #define F_EQU(a, b) (close_enough((a), (b), TOLERANCE))
-#define FFIX_EQU(a, b) (close_enough((a), (b), 0.01f))
+#define FFIX_EQU(a, b) (close_enough((a), (b), 0.05f))  // wow !
 
 extern void _breakpoint();
 #pragma aux _breakpoint = "int 0x03";
 
-
 #define ASSERT(x) \
     do { \
         if (!(x)) { \
diff --git a/TEST/TEST.C b/TEST/TEST.C
index 4b288e0..ba833cc 100644
--- a/TEST/TEST.C
+++ b/TEST/TEST.C
@@ -69,7 +69,6 @@ int main(void) {
 
     surface_free(backbuffer);
 
-
     return 0;
 }