diff --git a/indent-2.2.12-Recognize-binary-integer-literals.patch b/indent-2.2.12-Recognize-binary-integer-literals.patch
new file mode 100644
index 0000000..e33d0a4
--- /dev/null
+++ b/indent-2.2.12-Recognize-binary-integer-literals.patch
@@ -0,0 +1,124 @@
+From 2b1d8978ea303e8da1bc8f672cdb82c76ef38c02 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
+Date: Mon, 3 Dec 2018 10:42:21 +0100
+Subject: [PATCH] Recognize binary integer literals
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Some compilers support binary constants written as 0b1 or 0B1. This is
+the case of GCC
+<https://gcc.gnu.org/onlinedocs/gcc/Binary-constants.html>.
+
+This is based on a patch provided by Josef Kubin <entomolog@centrum.cz>.
+
+<https://bugzilla.redhat.com/show_bug.cgi?id=1655319>
+
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ regression/TEST                       |  2 +-
+ regression/input/binary-constant.c    | 12 ++++++++++++
+ regression/standard/binary-constant.c | 12 ++++++++++++
+ src/lexi.c                            | 23 +++++++++++++++++------
+ 4 files changed, 42 insertions(+), 7 deletions(-)
+ create mode 100644 regression/input/binary-constant.c
+ create mode 100644 regression/standard/binary-constant.c
+
+diff --git a/regression/TEST b/regression/TEST
+index 56f41d9..64b9bce 100755
+--- a/regression/TEST
++++ b/regression/TEST
+@@ -37,7 +37,7 @@ BUGS="case-label.c one-line-1.c one-line-2.c one-line-3.c \
+         one-line-4.c struct-decl.c sizeof-in-while.c line-break-comment.c \
+         macro.c enum.c elif.c nested.c wrapped-string.c minus_predecrement.c \
+         bug-gnu-33364.c float-constant-suffix.c block-comments.c \
+-        no-forced-nl-in-block-init.c hexadecimal_float.c"
++        no-forced-nl-in-block-init.c hexadecimal_float.c binary-constant.c"
+ 
+ INDENTSRC="args.c backup.h backup.c dirent_def.h globs.c indent.h \
+         indent.c indent_globs.h io.c lexi.c memcpy.c parse.c pr_comment.c \
+diff --git a/regression/input/binary-constant.c b/regression/input/binary-constant.c
+new file mode 100644
+index 0000000..25f1624
+--- /dev/null
++++ b/regression/input/binary-constant.c
+@@ -0,0 +1,12 @@
++int foo = 0b1;
++long int foo = 0b1L;
++unsigned int foo = 0b1U;
++unsigned long int foo = 0b1LU;
++
++int foo = 0B1;
++long int foo = 0B1L;
++unsigned int foo = 0B1U;
++unsigned long int foo = 0B1LU;
++
++int foo = 0b01010101;
++int foo = 0B01010101;
+diff --git a/regression/standard/binary-constant.c b/regression/standard/binary-constant.c
+new file mode 100644
+index 0000000..25f1624
+--- /dev/null
++++ b/regression/standard/binary-constant.c
+@@ -0,0 +1,12 @@
++int foo = 0b1;
++long int foo = 0b1L;
++unsigned int foo = 0b1U;
++unsigned long int foo = 0b1LU;
++
++int foo = 0B1;
++long int foo = 0B1L;
++unsigned int foo = 0B1U;
++unsigned long int foo = 0B1LU;
++
++int foo = 0b01010101;
++int foo = 0B01010101;
+diff --git a/src/lexi.c b/src/lexi.c
+index 848ddc9..6eaba95 100644
+--- a/src/lexi.c
++++ b/src/lexi.c
+@@ -286,15 +286,24 @@ extern codes_ty lexi(void)
+       if (parser_state_tos->last_rw == rw_return)
+           parser_state_tos->last_rw = rw_none;
+ 
++      /* decimal, octal, hex, binary and floating point number format */
+       if (isdigit (*buf_ptr) ||
+           ((buf_ptr[0] == '.') && isdigit (buf_ptr[1])))
+       {
+-         int seendot = 0, seenexp = 0, ishexa = 0;
++         int seendot = 0, seenexp = 0, ishexa = 0, isbinary = 0;
+ 
+-         if ((*buf_ptr == '0') && ((buf_ptr[1] == 'x') || (buf_ptr[1] == 'X')))
++         if (*buf_ptr == '0')
+          {
+-            ishexa = 1;
+-            buf_ptr += 1;
++            if ((buf_ptr[1] == 'x') || (buf_ptr[1] == 'X'))
++            {
++               ishexa = 1;
++               buf_ptr += 1;
++            }
++            else if ((buf_ptr[1] == 'b') || (buf_ptr[1] == 'B'))
++            {
++               isbinary = 1;
++               buf_ptr += 1;
++            }
+          }
+          while (1)
+          {
+@@ -312,8 +321,10 @@ extern codes_ty lexi(void)
+ 
+             buf_ptr++;
+ 
+-            if (!(ishexa && !seenexp ?
+-                 isxdigit (*buf_ptr) : isdigit (*buf_ptr)
++            if (!(
++                 (ishexa && !seenexp && isxdigit (*buf_ptr)) ||
++                 (isbinary && !seenexp && (*buf_ptr == '0' || *buf_ptr == '1')) ||
++                 ((!(ishexa || isbinary) || seenexp) && isdigit (*buf_ptr))
+                  ) && *buf_ptr != '.')
+             {
+                if ((ishexa ?
+-- 
+2.17.2
+
diff --git a/indent.spec b/indent.spec
index 41687e5..aee0be2 100644
--- a/indent.spec
+++ b/indent.spec
@@ -37,6 +37,9 @@ Patch1:     indent-2.2.12-doc-Fix-dont-cuddle-else-short-option-and-index-remo.p
 # license is "GPLv3+ with exception", proposed to upstream
 # <http://lists.gnu.org/archive/html/bug-indent/2018-09/threads.html>
 Patch2:     indent-2.2.12-Add-m4-ax_cc_for_build.m4-for-CC_FOR_BUILD.patch
+# Recognize binary integer literals, bug #1655319, submitted to the upstream
+# <http://lists.gnu.org/archive/html/bug-indent/2018-12/msg00000.html>
+Patch3:     indent-2.2.12-Recognize-binary-integer-literals.patch
 # Update config.sub to support aarch64, bug #925588
 BuildRequires:  autoconf
 BuildRequires:  automake
@@ -62,6 +65,7 @@ you want a program to format your code.
 %setup -q
 %patch1 -p1
 %patch2 -p1
+%patch3 -p1
 # Regenerate sources
 rm src/gperf.c src/gperf-cc.c
 # Update config.sub to support aarch64, bug #925588
@@ -93,6 +97,7 @@ make check
 %changelog
 * Fri Feb 01 2019 Petr Pisar <ppisar@redhat.com> - 2.2.12-3
 - Correct invoking tests at build time
+- Recognize binary integer literals (bug #1655319)
 
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.2.12-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild