diff --git a/USER_MANUAL.md b/USER_MANUAL.md
index a21631c6..184cfca1 100644
--- a/USER_MANUAL.md
+++ b/USER_MANUAL.md
@@ -908,6 +908,7 @@ LDPC | Low Density Parity Check Codes - a family of powerful FEC codes
 3. Build system:
     * Allow overrriding the version tag when building. (PR #727)
     * Update wxWidgets to 3.2.6. (PR #748)
+    * Update Hamlib to 4.6. (PR #795)
 4. Miscellaneous:
     * Add issue template for SW bugs. (PR #759)
 
diff --git a/build_osx.sh b/build_osx.sh
index 1c128782..4156ecfd 100755
--- a/build_osx.sh
+++ b/build_osx.sh
@@ -41,7 +41,7 @@ cd $FREEDVGUIDIR
 if [ ! -d hamlib-code ]; then
     git clone https://github.com/Hamlib/Hamlib.git hamlib-code
 fi
-cd hamlib-code && git checkout 4.5.5 && git pull
+cd hamlib-code && git checkout 4.6 && git pull
 ./bootstrap
 if [ $UNIV_BUILD == 1 ]; then
     CFLAGS="-g -O2 -mmacosx-version-min=10.9 -arch x86_64 -arch arm64" CXXFLAGS="-g -O2 -mmacosx-version-min=10.9 -arch x86_64 -arch arm64" ./configure --enable-shared --prefix $HAMLIBDIR
diff --git a/cmake/BuildHamlib.cmake b/cmake/BuildHamlib.cmake
index b9964a67..9e4958cf 100644
--- a/cmake/BuildHamlib.cmake
+++ b/cmake/BuildHamlib.cmake
@@ -16,7 +16,7 @@ endif(MINGW AND CMAKE_CROSSCOMPILING)
 
 include(ExternalProject)
 ExternalProject_Add(build_hamlib
-    URL https://github.com/Hamlib/Hamlib/archive/refs/heads/Hamlib-4.5.5.zip
+    URL https://github.com/Hamlib/Hamlib/archive/refs/tags/4.6.zip
     BUILD_IN_SOURCE 1
     INSTALL_DIR external/dist
     PATCH_COMMAND ${HAMLIB_PATCH_CMD}
diff --git a/cmake/GetDependencies.cmake.in b/cmake/GetDependencies.cmake.in
index e08923f1..a9cbbc2f 100644
--- a/cmake/GetDependencies.cmake.in
+++ b/cmake/GetDependencies.cmake.in
@@ -94,6 +94,7 @@ set( _windlls
     OLEACC.dll
     msvcrt.dll
     bcrypt.dll
+    IPHLPAPI.DLL
 
     # The below are additional DLLs required when compiled
     # using the LLVM version of MinGW.
diff --git a/cmake/hamlib-windows.patch b/cmake/hamlib-windows.patch
index 276bdf2b..76636c1d 100644
--- a/cmake/hamlib-windows.patch
+++ b/cmake/hamlib-windows.patch
@@ -1,6 +1,19 @@
---- hamlib-4.5.5/rigs/dummy/flrig.c	2023-04-05 05:31:23.000000000 -0700
-+++ build_hamlib/rigs/dummy/flrig.c	2023-05-18 18:59:19.584095384 -0700
-@@ -76,7 +76,7 @@
+diff -ur hamlib-4.6-orig/configure.ac hamlib-4.6/configure.ac
+--- hamlib-4.6-orig/configure.ac	2024-12-24 00:55:54
++++ hamlib-4.6/configure.ac	2025-01-05 15:42:44
+@@ -317,7 +317,7 @@
+ 
+     [mingw* | pw32* | cygwin*], [
+ 	AM_CONDITIONAL([VERSIONDLL], true)
+-	WINLDFLAGS="-Wl,--output-def,libhamlib.def -Wl,--add-stdcall-alias"
++	WINLDFLAGS="-Wl,--output-def,libhamlib.def"
+     VERSIONDLL="version_dll.rc"
+ 	AC_SUBST([WINLDFLAGS])
+ 
+diff -ur hamlib-4.6-orig/rigs/dummy/flrig.c hamlib-4.6/rigs/dummy/flrig.c
+--- hamlib-4.6-orig/rigs/dummy/flrig.c	2024-12-24 00:55:54
++++ hamlib-4.6/rigs/dummy/flrig.c	2025-01-05 15:42:59
+@@ -73,7 +73,7 @@
  static int flrig_set_vfo(RIG *rig, vfo_t vfo);
  static int flrig_set_ptt(RIG *rig, vfo_t vfo, ptt_t ptt);
  static int flrig_get_ptt(RIG *rig, vfo_t vfo, ptt_t *ptt);
@@ -9,14 +22,3 @@
  static int flrig_set_split_freq(RIG *rig, vfo_t vfo, freq_t tx_freq);
  static int flrig_get_split_freq(RIG *rig, vfo_t vfo, freq_t *tx_freq);
  static int flrig_set_split_vfo(RIG *rig, vfo_t vfo, split_t split,
---- hamlib-4.5.5/configure.ac	2023-04-05 05:31:23.000000000 -0700
-+++ build_hamlib/configure.ac	2023-05-18 19:11:32.454634661 -0700
-@@ -281,7 +281,7 @@
- 	AC_SUBST([OSXLDFLAGS])],
- 
-     [mingw* | pw32* | cygwin*], [
--	WINLDFLAGS="-Wl,--output-def,libhamlib.def -Wl,--add-stdcall-alias"
-+	WINLDFLAGS="-Wl,--output-def,libhamlib.def"
- 	AC_SUBST([WINLDFLAGS])
- 
- 	# Enable ld's "auto import" for executables