diff -Nru deborphan-1.7.32/debian/changelog deborphan-1.7.33/debian/changelog
--- deborphan-1.7.32/debian/changelog	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/debian/changelog	2020-05-20 13:58:26.000000000 +0000
@@ -1,3 +1,11 @@
+deborphan (1.7.33) unstable; urgency=medium
+
+  * Use quotes to refer to local include files
+  * Avoid crash in addkeep with empty keep files (Closes: #929273)
+  * Bump Standards-Version to 4.5.0
+
+ -- Chris Hofstaedtler <zeha@debian.org>  Wed, 20 May 2020 13:58:26 +0000
+
 deborphan (1.7.32) unstable; urgency=medium
 
   [ Debian Janitor ]
diff -Nru deborphan-1.7.32/debian/control deborphan-1.7.33/debian/control
--- deborphan-1.7.32/debian/control	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/debian/control	2020-05-20 13:58:26.000000000 +0000
@@ -4,7 +4,7 @@
 Maintainer: deborphan Maintainers <deborphan@packages.debian.org>
 Uploaders: Chris Hofstaedtler <zeha@debian.org>,
            Carsten Hey <carsten@debian.org>
-Standards-Version: 4.4.1
+Standards-Version: 4.5.0
 Build-Depends: debhelper-compat (= 12),
                po4a
 Rules-Requires-Root: no
diff -Nru deborphan-1.7.32/src/deborphan.c deborphan-1.7.33/src/deborphan.c
--- deborphan-1.7.32/src/deborphan.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/deborphan.c	2020-05-20 13:58:26.000000000 +0000
@@ -15,8 +15,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <config.h>
-#include <deborphan.h>
+#include "config.h"
+#include "deborphan.h"
 
 /* These files should already be installed on the host machine -
    the GPL does not allow redistribution in this package. */
diff -Nru deborphan-1.7.32/src/exit.c deborphan-1.7.33/src/exit.c
--- deborphan-1.7.32/src/exit.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/exit.c	2020-05-20 13:58:26.000000000 +0000
@@ -7,14 +7,14 @@
    file COPYING provided in this package for details.
 */
 
+#include <errno.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <config.h>
-#include <deborphan.h>
-#include <errno.h>
+#include "config.h"
+#include "deborphan.h"
 
 #ifdef ENABLE_NLS
 #include <libintl.h>
diff -Nru deborphan-1.7.32/src/file.c deborphan-1.7.33/src/file.c
--- deborphan-1.7.32/src/file.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/file.c	2020-05-20 13:58:26.000000000 +0000
@@ -7,18 +7,17 @@
    file COPYING provided in this package for details.
 */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
-
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
-#include <config.h>
-#include <deborphan.h>
-#include <errno.h>
+#include "config.h"
+#include "deborphan.h"
 
 /* This uses up as much memory as your status file (near a
  * megabyte). It is considerably faster, though.
diff -Nru deborphan-1.7.32/src/keep.c deborphan-1.7.33/src/keep.c
--- deborphan-1.7.32/src/keep.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/keep.c	2020-05-20 13:58:26.000000000 +0000
@@ -15,13 +15,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
-
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
-#include <deborphan.h>
+#include "deborphan.h"
 
 /* If package is a valid package, this function returns 0. On error, it
  * returns -1, if it is not a valid package, it returns the position in
@@ -130,15 +129,23 @@
         error(EXIT_FAILURE, errno, "Opening %s", kfile);
     }
 
-    // ... check if the final newline is missing ...
-    if (fseek(fp, -1L, SEEK_END) < 0) {
+    if (fseek(fp, 0L, SEEK_END) < 0) {
         error(EXIT_FAILURE, errno, "fseek on %s", kfile);
     }
-    c = fgetc(fp);
-    fseek(fp, 0L, SEEK_END);
-    if (c != EOF && c != '\n') {
-        // ... and add '\n' if appropriate.
-        fputc('\n', fp);
+
+    if (ftell(fp) != 0L) {
+        // ... check if the final newline is missing ...
+        if (fseek(fp, -1L, SEEK_END) < 0) {
+            error(EXIT_FAILURE, errno, "fseek on %s", kfile);
+        }
+        c = fgetc(fp);
+        if (fseek(fp, 0L, SEEK_END) < 0) {
+            error(EXIT_FAILURE, errno, "fseek on %s", kfile);
+        }
+        if (c != EOF && c != '\n') {
+            // ... and add '\n' if appropriate.
+            fputc('\n', fp);
+        }
     }
 
     int i = 0;
diff -Nru deborphan-1.7.32/src/libdeps.c deborphan-1.7.33/src/libdeps.c
--- deborphan-1.7.32/src/libdeps.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/libdeps.c	2020-05-20 13:58:26.000000000 +0000
@@ -13,8 +13,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <config.h>
-#include <deborphan.h>
+#include "config.h"
+#include "deborphan.h"
 
 extern int options[];
 
diff -Nru deborphan-1.7.32/src/pkginfo.c deborphan-1.7.33/src/pkginfo.c
--- deborphan-1.7.32/src/pkginfo.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/pkginfo.c	2020-05-20 13:58:26.000000000 +0000
@@ -12,12 +12,12 @@
    result in deborphan giving the wrong packages, or even crashing. */
 
 #include <regex.h>
+#include <set.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <config.h>
-#include <deborphan.h>
-#include <set.h>
+#include "config.h"
+#include "deborphan.h"
 
 static regex_t re_statusinst, re_statusnotinst, re_statushold, re_namedev,
     re_gnugrepv, re_descdummy, re_desctransit, re_statusconfig, re_status;
diff -Nru deborphan-1.7.32/src/set.c deborphan-1.7.33/src/set.c
--- deborphan-1.7.32/src/set.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/set.c	2020-05-20 13:58:26.000000000 +0000
@@ -5,12 +5,13 @@
    Distributed under the terms of the MIT License, see the
    file COPYING provided in this package for details.
 */
+#include <set.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
-#include <deborphan.h>
-#include <set.h>
+#include "config.h"
+#include "deborphan.h"
 
 dep* set_dep(dep* p, const char* name) {
     char *str, *t;
diff -Nru deborphan-1.7.32/src/string.c deborphan-1.7.33/src/string.c
--- deborphan-1.7.32/src/string.c	2019-10-16 22:14:03.000000000 +0000
+++ deborphan-1.7.33/src/string.c	2020-05-20 13:58:26.000000000 +0000
@@ -6,9 +6,11 @@
    file COPYING provided in this package for details.
 */
 
-#include <deborphan.h>
 #include <string.h>
 
+#include "config.h"
+#include "deborphan.h"
+
 /* Simple function to hash a string to an unsigned int.
  */
 unsigned int strhash(const char* line) {