diff --git a/libvips/colour/CMYK2XYZ.c b/libvips/colour/CMYK2XYZ.c
index 33aaeb86..8bf4d4ff 100644
--- a/libvips/colour/CMYK2XYZ.c
+++ b/libvips/colour/CMYK2XYZ.c
@@ -129,7 +129,7 @@ vips_CMYK2XYZ_init( VipsCMYK2XYZ *CMYK2XYZ )
 {
 }
 
-#else
+#else /*!HAVE_LCMS2*/
 
 typedef VipsColourCode VipsCMYK2XYZ;
 typedef VipsColourCodeClass VipsCMYK2XYZClass;
@@ -139,28 +139,28 @@ G_DEFINE_TYPE(VipsCMYK2XYZ, vips_CMYK2XYZ, VIPS_TYPE_COLOUR_CODE);
 void
 vips_CMYK2XYZ_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
 {
-    unsigned char *p = (unsigned char *) in[0];
-    float *q = (float *) out;
+	unsigned char *p = (unsigned char *) in[0];
+	float *q = (float *) out;
 
-    int i;
+	int i;
 
-    for (i = 0; i < width; i++) {
-        float c = p[0] / 255.0;
-        float m = p[1] / 255.0;
-        float y = p[2] / 255.0;
-        float k = p[3] / 255.0;
-        
-        float r = 1.0 - (c * (1.0 - k) + k);
-        float g = 1.0 - (m * (1.0 - k) + k);
-        float b = 1.0 - (y * (1.0 - k) + k);
+	for( i = 0; i < width; i++ ) {
+		float c = p[0] / 255.0;
+		float m = p[1] / 255.0;
+		float y = p[2] / 255.0;
+		float k = p[3] / 255.0;
 
-        q[0] = VIPS_D65_X0 * r;
-        q[1] = VIPS_D65_Y0 * g;
-        q[2] = VIPS_D65_Z0 * b;
+		float r = 1.0 - (c * (1.0 - k) + k);
+		float g = 1.0 - (m * (1.0 - k) + k);
+		float b = 1.0 - (y * (1.0 - k) + k);
 
-        p += 4;
-        q += 3;
-    }
+		q[0] = VIPS_D65_X0 * r;
+		q[1] = VIPS_D65_Y0 * g;
+		q[2] = VIPS_D65_Z0 * b;
+
+		p += 4;
+		q += 3;
+	}
 }
 
 static void
@@ -176,23 +176,23 @@ vips_CMYK2XYZ_class_init( VipsCMYK2XYZClass *class )
 	object_class->nickname = "CMYK2XYZ";
 	object_class->description = _( "transform CMYK to XYZ" );
     
-    colour_class->process_line = vips_CMYK2XYZ_line;
+	colour_class->process_line = vips_CMYK2XYZ_line;
 }
 
 static void
 vips_CMYK2XYZ_init( VipsCMYK2XYZ *CMYK2XYZ )
 {
-    VipsColour *colour = VIPS_COLOUR( CMYK2XYZ );
-    VipsColourCode *code = VIPS_COLOUR_CODE( CMYK2XYZ );
+	VipsColour *colour = VIPS_COLOUR( CMYK2XYZ );
+	VipsColourCode *code = VIPS_COLOUR_CODE( CMYK2XYZ );
 
-    colour->interpretation = VIPS_INTERPRETATION_XYZ;
-    colour->format = VIPS_FORMAT_FLOAT;
-    colour->bands = 3;
-    colour->input_bands = 4;
+	colour->interpretation = VIPS_INTERPRETATION_XYZ;
+	colour->format = VIPS_FORMAT_FLOAT;
+	colour->bands = 3;
+	colour->input_bands = 4;
 
-    code->input_coding = VIPS_CODING_NONE;
-    code->input_format = VIPS_FORMAT_UCHAR;
-    code->input_interpretation = VIPS_INTERPRETATION_CMYK;
+	code->input_coding = VIPS_CODING_NONE;
+	code->input_format = VIPS_FORMAT_UCHAR;
+	code->input_interpretation = VIPS_INTERPRETATION_CMYK;
 }
 
 #endif /*HAVE_LCMS2*/
diff --git a/libvips/colour/XYZ2CMYK.c b/libvips/colour/XYZ2CMYK.c
index 7acadc3e..475f9235 100644
--- a/libvips/colour/XYZ2CMYK.c
+++ b/libvips/colour/XYZ2CMYK.c
@@ -128,7 +128,7 @@ vips_XYZ2CMYK_init( VipsXYZ2CMYK *XYZ2CMYK )
 {
 }
 
-#else
+#else /*!HAVE_LCMS2*/
 
 typedef VipsColourCode VipsXYZ2CMYK;
 typedef VipsColourCodeClass VipsXYZ2CMYKClass;
@@ -138,40 +138,42 @@ G_DEFINE_TYPE(VipsXYZ2CMYK, vips_XYZ2CMYK, VIPS_TYPE_COLOUR_CODE);
 void
 vips_XYZ2CMYK_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
 {
-    float *p = (float *) in[0];
-    unsigned char *q = (unsigned char *) out;
+	float *p = (float *) in[0];
+	unsigned char *q = (unsigned char *) out;
 
-    const float epsilon = 0.00001;
+	const float epsilon = 0.00001;
 
-    int i;
+	int i;
 
-    for (i = 0; i < width; i++) {
-        float c, m, y, k;
-        float r = p[0] / VIPS_D65_X0;
-        float g = p[1] / VIPS_D65_Y0;
-        float b = p[2] / VIPS_D65_Z0;
+	for( i = 0; i < width; i++ ) {
+		float r = p[0] / VIPS_D65_X0;
+		float g = p[1] / VIPS_D65_Y0;
+		float b = p[2] / VIPS_D65_Z0;
 
-        c = 255.0 - r;
-        m = 255.0 - g;
-        y = 255.0 - b;
-        k = c;
-        k = VIPS_MIN(k, VIPS_MIN(m, y));
+		float c, m, y, k;
 
-        c = (c - k) / (255.0 - k) * 255.0;
-        m = (m - k) / (255.0 - k) * 255.0;
-        y = (y - k) / (255.0 - k) * 255.0;
+		c = 255.0 - r;
+		m = 255.0 - g;
+		y = 255.0 - b;
+		k = VIPS_MIN( c, VIPS_MIN( m, y ) );
 
-        q[0] = (unsigned char) VIPS_CLIP(0, c, 255.0);
-        q[1] = (unsigned char) VIPS_CLIP(0, m, 255.0);
-        q[2] = (unsigned char) VIPS_CLIP(0, y, 255.0);
-        if (r < epsilon && g < epsilon && b < epsilon)
-            q[3] = 255.0;
-	else
-            q[3] = (unsigned char) VIPS_CLIP(0, k, 255.0);
+		c = (c - k) / (255.0 - k) * 255.0;
+		m = (m - k) / (255.0 - k) * 255.0;
+		y = (y - k) / (255.0 - k) * 255.0;
 
-        p += 3;
-        q += 4;
-    }
+		q[0] = (unsigned char) VIPS_CLIP(0, c, 255.0);
+		q[1] = (unsigned char) VIPS_CLIP(0, m, 255.0);
+		q[2] = (unsigned char) VIPS_CLIP(0, y, 255.0);
+		if( r < epsilon && 
+			g < epsilon && 
+			b < epsilon )
+			q[3] = 255.0;
+		else
+			q[3] = VIPS_CLIP( 0, k, 255 );
+
+		p += 3;
+		q += 4;
+	}
 }
 
 static void
@@ -187,23 +189,23 @@ vips_XYZ2CMYK_class_init( VipsXYZ2CMYKClass *class )
 	object_class->nickname = "XYZ2CMYK";
 	object_class->description = _( "transform XYZ to CMYK" );
     
-    colour_class->process_line = vips_XYZ2CMYK_line;
+	colour_class->process_line = vips_XYZ2CMYK_line;
 }
 
 static void
 vips_XYZ2CMYK_init( VipsXYZ2CMYK *XYZ2CMYK )
 {
-    VipsColour *colour = VIPS_COLOUR( XYZ2CMYK );
-    VipsColourCode *code = VIPS_COLOUR_CODE( XYZ2CMYK );
+	VipsColour *colour = VIPS_COLOUR( XYZ2CMYK );
+	VipsColourCode *code = VIPS_COLOUR_CODE( XYZ2CMYK );
 
-    colour->interpretation = VIPS_INTERPRETATION_CMYK;
-    colour->format = VIPS_FORMAT_UCHAR;
-    colour->bands = 4;
-    colour->input_bands = 3;
+	colour->interpretation = VIPS_INTERPRETATION_CMYK;
+	colour->format = VIPS_FORMAT_UCHAR;
+	colour->bands = 4;
+	colour->input_bands = 3;
 
-    code->input_coding = VIPS_CODING_NONE;
-    code->input_format = VIPS_FORMAT_FLOAT;
-    code->input_interpretation = VIPS_INTERPRETATION_XYZ;
+	code->input_coding = VIPS_CODING_NONE;
+	code->input_format = VIPS_FORMAT_FLOAT;
+	code->input_interpretation = VIPS_INTERPRETATION_XYZ;
 }
 
 #endif /*HAVE_LCMS2*/