diff --git a/usr.bin/diff/diff.h b/usr.bin/diff/diff.h
--- a/usr.bin/diff/diff.h
+++ b/usr.bin/diff/diff.h
@@ -80,6 +80,7 @@
 #define D_STRIPCR		0x400	/* Strip trailing cr */
 #define D_SKIPBLANKLINES	0x800	/* Skip blank lines */
 #define D_MATCHLAST		0x1000	/* Display last line matching provided regex */
+#define D_PAGINATION		0x2000  /* Paginate via pr(1) */
 
 /* Features supported by new algorithms */
 #define D_NEWALGO_FLAGS                (D_FORCEASCII | D_PROTOTYPE | D_IGNOREBLANKS)
diff --git a/usr.bin/diff/diff.c b/usr.bin/diff/diff.c
--- a/usr.bin/diff/diff.c
+++ b/usr.bin/diff/diff.c
@@ -249,6 +249,7 @@
 				usage();
 			break;
 		case 'l':
+			dflags |= D_PAGINATION;
 			lflag = true;
 			break;
 		case 'N':
diff --git a/usr.bin/diff/diffreg_new.c b/usr.bin/diff/diffreg_new.c
--- a/usr.bin/diff/diffreg_new.c
+++ b/usr.bin/diff/diffreg_new.c
@@ -33,6 +33,7 @@
 #include <time.h>
 #include <unistd.h>
 
+#include "pr.h"
 #include "diff.h"
 #include <arraylist.h>
 #include <diff_main.h>
@@ -146,6 +147,7 @@
 {
 	char *str1, *str2;
 	FILE *f1, *f2;
+	struct pr *pr = NULL;
 	struct stat st1, st2;
 	struct diff_input_info info;
 	struct diff_data left = {}, right = {};
@@ -178,6 +180,9 @@
 	f1 = openfile(file1, &str1, &st1);
 	f2 = openfile(file2, &str2, &st2);
 
+	if (flags & D_PAGINATION)
+		pr = start_pr(file1, file2);
+
 	if (capsicum) {
 		cap_rights_init(&rights_ro, CAP_READ, CAP_FSTAT, CAP_SEEK);
 		if (caph_rights_limit(fileno(f1), &rights_ro) < 0)
@@ -271,6 +276,8 @@
 		status |= 1;
 	}
 done:
+	if (pr != NULL)
+		stop_pr(pr);
 	diff_result_free(result);
 	diff_data_free(&left);
 	diff_data_free(&right);