diff --git a/1e6bce288f284fba4db4ab376dbbd0edcaa065f3.patch b/1e6bce288f284fba4db4ab376dbbd0edcaa065f3.patch
new file mode 100644
index 0000000..bd7b47d
--- /dev/null
+++ b/1e6bce288f284fba4db4ab376dbbd0edcaa065f3.patch
@@ -0,0 +1,54 @@
+From 1e6bce288f284fba4db4ab376dbbd0edcaa065f3 Mon Sep 17 00:00:00 2001
+From: Michael Black W9MDB <mdblack98@yahoo.com>
+Date: Thu, 24 Dec 2020 23:15:42 -0600
+Subject: [PATCH] Add C4FM mode to flrig.c
+ https://github.com/Hamlib/Hamlib/issues/478
+
+---
+ rigs/dummy/flrig.c | 5 ++++-
+ rigs/dummy/flrig.h | 2 +-
+ 2 files changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/rigs/dummy/flrig.c b/rigs/dummy/flrig.c
+index 5dc4f823..b4df56df 100644
+--- a/rigs/dummy/flrig.c
++++ b/rigs/dummy/flrig.c
+@@ -55,7 +55,8 @@
+                      RIG_MODE_RTTY | RIG_MODE_RTTYR |\
+                      RIG_MODE_PKTLSB | RIG_MODE_PKTUSB |\
+                      RIG_MODE_SSB | RIG_MODE_LSB | RIG_MODE_USB |\
+-             RIG_MODE_FM | RIG_MODE_WFM | RIG_MODE_FMN |RIG_MODE_PKTFM )
++                     RIG_MODE_FM | RIG_MODE_WFM | RIG_MODE_FMN | RIG_MODE_PKTFM |\
++                     RIG_MODE_C4FM)
+ 
+ #define FLRIG_LEVELS (RIG_LEVEL_AF | RIG_LEVEL_RF | RIG_LEVEL_MICGAIN | RIG_LEVEL_STRENGTH | RIG_LEVEL_RFPOWER_METER | RIG_LEVEL_RFPOWER_METER_WATTS)
+ 
+@@ -207,6 +208,7 @@ static struct s_modeMap modeMap[] =
+     {RIG_MODE_CWR, NULL},
+     {RIG_MODE_RTTY, NULL},
+     {RIG_MODE_RTTYR, NULL},
++    {RIG_MODE_C4FM, NULL},
+     {0, NULL}
+ };
+ 
+@@ -906,6 +908,7 @@ static int flrig_open(RIG *rig)
+         else if (streq(p, "W-FM")) { modeMapAdd(&modes, RIG_MODE_WFM, p); }
+         else if (streq(p, "WFM")) { modeMapAdd(&modes, RIG_MODE_WFM, p); }
+         else if (streq(p, "UCW")) { modeMapAdd(&modes, RIG_MODE_CW, p); }
++        else if (streq(p, "C4FM")) { modeMapAdd(&modes, RIG_MODE_C4FM, p); }
+         else { rig_debug(RIG_DEBUG_ERR, "%s: Unknown mode (new?) for this rig='%s'\n", __func__, p); }
+     }
+ 
+diff --git a/rigs/dummy/flrig.h b/rigs/dummy/flrig.h
+index ad0e0f74..b46ceeb7 100644
+--- a/rigs/dummy/flrig.h
++++ b/rigs/dummy/flrig.h
+@@ -28,7 +28,7 @@
+ #include <sys/time.h>
+ #endif
+ 
+-#define BACKEND_VER "20201217"
++#define BACKEND_VER "20201224"
+ 
+ #define EOM "\r"
+ #define TRUE 1
diff --git a/hamlib.spec b/hamlib.spec
index ae9a797..4c956e2 100644
--- a/hamlib.spec
+++ b/hamlib.spec
@@ -27,6 +27,8 @@ Source0:        http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.
 Patch0:         hamlib-4.0-perl_install.patch
 # -lpython is not needed, https://github.com/Hamlib/Hamlib/issues/253
 Patch1:         hamlib-4.0-drop-libpython.patch
+# Patch for flrig advertising C4FM mode not currently understood by hamlib
+Patch2:         https://github.com/Hamlib/Hamlib/commit/1e6bce288f284fba4db4ab376dbbd0edcaa065f3.patch
 
 
 BuildRequires:  automake autoconf libtool
@@ -44,7 +46,7 @@ BuildRequires:  libtool-ltdl-devel
 BuildRequires:  perl-devel
 BuildRequires:  perl-generators
 BuildRequires:  perl(ExtUtils::MakeMaker)
-BuildRequires: make
+BuildRequires:  make
 
 # Filter provides from private libraries.
 %{?perl_default_filter}
@@ -131,7 +133,7 @@ export PYTHON=%{__python2}
 %endif
 
 # Only run if we're working with a git checkout
-%if 0%{?githash}1
+%if 0%{?githash}
 autoreconf -fi
 %endif