diff --git a/djvu.c b/djvu.c
index c80ba75ad..b39180087 100644
--- a/djvu.c
+++ b/djvu.c
@@ -484,13 +484,13 @@ static int reflowPage(lua_State *L) {
 	int text_wrap = luaL_checkint(L, 10);
 	int straighten = luaL_checkint(L, 11);
 	int justification = luaL_checkint(L, 12);
-	int columns = luaL_checkint(L, 13);
-	double contrast = luaL_checknumber(L, 14);
-	int rotation = luaL_checknumber(L, 15);
+	int detect_indent = luaL_checkint(L, 13);
+	int columns = luaL_checkint(L, 14);
+	double contrast = luaL_checknumber(L, 15);
+	int rotation = luaL_checknumber(L, 16);
 
 	k2pdfopt_set_params(width, height, font_size, page_margin, line_spacing, word_spacing, \
-			text_wrap, straighten, justification, columns, contrast, rotation);
-
+			text_wrap, straighten, justification, detect_indent, columns, contrast, rotation);
 	k2pdfopt_djvu_reflow(page->page_ref, page->doc->context, mode, page->doc->pixelformat);
 	k2pdfopt_rfbmp_size(&width, &height);
 	k2pdfopt_rfbmp_zoom(&dc->zoom);
diff --git a/k2pdfopt.c b/k2pdfopt.c
index 163a728cf..8b3d5662c 100644
--- a/k2pdfopt.c
+++ b/k2pdfopt.c
@@ -245,6 +245,7 @@ static int column_fitted = 0;
 static double lm_org, bm_org, tm_org, rm_org, dpi_org;
 static double contrast_max = 2.0;
 static int show_marked_source = 0;
+static int preserve_indentation = 1;
 static double defect_size_pts = 1.0;
 static double max_vertical_gap_inches = 0.25;
 static double vertical_multiplier = 1.0;
@@ -494,7 +495,8 @@ static void k2pdfopt_reflow_bmp(MASTERINFO *masterinfo, WILLUSBITMAP *src) {
 void k2pdfopt_set_params(int bb_width, int bb_height, \
 		double font_size, double page_margin, \
 		double line_space, double word_space, \
-		int wrapping, int straighten, int justification, \
+		int wrapping, int straighten, \
+		int justification, int detect_indent,\
 		int columns, double contrast, int rotation) {
 	dst_userwidth  = bb_width; // dst_width is adjusted in adjust_params_init
 	dst_userheight = bb_height;
@@ -503,6 +505,7 @@ void k2pdfopt_set_params(int bb_width, int bb_height, \
 	word_spacing = word_space;
 	text_wrap = wrapping;
 	src_autostraighten = straighten;
+	preserve_indentation = detect_indent;
 	max_columns = columns;
 	gamma_correction = contrast;  // contrast is only used by k2pdfopt_mupdf_reflow
 	src_rot = rotation;
@@ -513,7 +516,7 @@ void k2pdfopt_set_params(int bb_width, int bb_height, \
 	dst_marbot = -1.0;
 	dst_marleft = -1.0;
 	dst_marright = -1.0;
-
+	printf("justification:%d", justification);
 	// justification
 	if (justification < 0) {
 		dst_justify = -1;
@@ -3155,6 +3158,7 @@ static void bmpregion_analyze_justification_and_line_spacing(BMPREGION *region,
 			indent1 = (double) (c1[i - i1] - region->c1) / textheight;
 		else
 			indent1 = (double) (region->c2 - c2[i - i1]) / textheight;
+		if (preserve_indentation == 0) indent1 = 0;
 // printf("    row %2d:  indent1=%g\n",i-i1,indent1);
 		if (!breakinfo->centered) {
 			indented[i - i1] = (indent1 > 0.5 && ilfi < 1.2 && ilf < .25);
diff --git a/k2pdfopt.h b/k2pdfopt.h
index 1c8c3a884..3b6cac5a5 100644
--- a/k2pdfopt.h
+++ b/k2pdfopt.h
@@ -29,7 +29,8 @@
 void k2pdfopt_set_params(int bb_width, int bb_height, \
 		double font_size, double page_margin, \
 		double line_space, double word_space, \
-		int wrapping, int straighten, int justification, \
+		int wrapping, int straighten, \
+		int justification, int detect_indent, \
 		int columns, double contrast, int rotation);
 void k2pdfopt_mupdf_reflow(fz_document *doc, fz_page *page, fz_context *ctx);
 void k2pdfopt_djvu_reflow(ddjvu_page_t *page, ddjvu_context_t *ctx, ddjvu_render_mode_t mode, ddjvu_format_t *fmt);
diff --git a/pdf.c b/pdf.c
index 133574f4e..c31ffe5cd 100644
--- a/pdf.c
+++ b/pdf.c
@@ -524,12 +524,13 @@ static int reflowPage(lua_State *L) {
 	int text_wrap = luaL_checkint(L, 10);
 	int straighten = luaL_checkint(L, 11);
 	int justification = luaL_checkint(L, 12);
-	int columns = luaL_checkint(L, 13);
-	double contrast = luaL_checknumber(L, 14);
-	int rotation = luaL_checknumber(L, 15);
+	int detect_indent = luaL_checkint(L, 13);
+	int columns = luaL_checkint(L, 14);
+	double contrast = luaL_checknumber(L, 15);
+	int rotation = luaL_checknumber(L, 16);
 
 	k2pdfopt_set_params(width, height, font_size, page_margin, line_spacing, word_spacing, \
-			text_wrap, straighten, justification, columns, contrast, rotation);
+			text_wrap, straighten, justification, detect_indent, columns, contrast, rotation);
 	k2pdfopt_mupdf_reflow(page->doc->xref, page->page, page->doc->context);
 	k2pdfopt_rfbmp_size(&width, &height);
 	k2pdfopt_rfbmp_zoom(&dc->zoom);