Index: trunk/src/globalconst.h
===================================================================
--- trunk/src/globalconst.h	(revision 27928)
+++ trunk/src/globalconst.h	(revision 27929)
@@ -41,8 +41,8 @@
 #define PCB_MAX_LAYERGRP     ((PCB_MAX_LAYER+8)*2)    /* max number of layer groups, a.k.a. physical layers: a few extra outer layers per side, pluse one substrate per real layer */
 #define PCB_MIN_THICKNESS    PCB_MIN_SIZE
 #define PCB_MAX_THICKNESS    PCB_MAX_COORD
-#define PCB_MIN_ARCSIZE      PCB_MIL_TO_COORD(0.01)
-#define PCB_MAX_ARCSIZE      ((pcb_coord_t)PCB_LARGE_VALUE)
+#define PCB_MIN_ARCRADIUS    PCB_MIL_TO_COORD(0.01)
+#define PCB_MAX_ARCRADIUS    ((pcb_coord_t)PCB_LARGE_VALUE)
 #define PCB_MIN_TEXTSCALE    10 /* scaling of text objects in percent */
 #define PCB_MAX_TEXTSCALE    10000
 #define PCB_MIN_PINORVIASIZE PCB_MIL_TO_COORD(20)	/* size of a pin or via */
Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 27928)
+++ trunk/src/obj_arc.c	(revision 27929)
@@ -491,7 +491,7 @@
 	}
 
 	value = (ctx->chgsize.is_absolute) ? ctx->chgsize.value : (*dst) + ctx->chgsize.value;
-	value = MIN(PCB_MAX_ARCSIZE, MAX(value, PCB_MIN_ARCSIZE));
+	value = MIN(PCB_MAX_ARCRADIUS, MAX(value, PCB_MIN_ARCRADIUS));
 	if (value != *dst) {
 		pcb_undo_add_obj_to_change_radii(PCB_OBJ_ARC, Layer, Arc, Arc);
 		pcb_arc_invalidate_erase(Arc);