diff --git a/Include/tesselator.h b/Include/tesselator.h
index 31d91f1..3d43155 100755
--- a/Include/tesselator.h
+++ b/Include/tesselator.h
@@ -126,7 +126,7 @@
 enum TessOption
 {
 	TESS_CONSTRAINED_DELAUNAY_TRIANGULATION,
-    TESS_REVERSE_CONTOURS
+	TESS_REVERSE_CONTOURS
 };
 
 typedef float TESSreal;
diff --git a/Source/tess.c b/Source/tess.c
index 60affbc..a2f5e14 100755
--- a/Source/tess.c
+++ b/Source/tess.c
@@ -987,9 +987,9 @@
 	case TESS_CONSTRAINED_DELAUNAY_TRIANGULATION:
 		tess->processCDT = value > 0 ? 1 : 0;
 		break;
-    case TESS_REVERSE_CONTOURS:
-        tess->reverseContours = value > 0 ? 1 : 0;
-        break;
+	case TESS_REVERSE_CONTOURS:
+		tess->reverseContours = value > 0 ? 1 : 0;
+		break;
 	}
 }
 
diff --git a/Source/tess.h b/Source/tess.h
index f54458d..30fda27 100755
--- a/Source/tess.h
+++ b/Source/tess.h
@@ -62,7 +62,7 @@
 	TESSreal bmax[2];
 
 	int processCDT;	/* option to run Constrained Delayney pass. */
-    int reverseContours; /* tessAddContour() will treat CCW contours as CW and vice versa */
+	int reverseContours; /* tessAddContour() will treat CCW contours as CW and vice versa */
     
 	/*** state needed for the line sweep ***/
 	int	windingRule;	/* rule for determining polygon interior */