diff --git a/CMakeLists.txt b/CMakeLists.txt
index 800523454..9ca27aa96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -421,13 +421,7 @@ add_subdirectory(logging)
 add_subdirectory(qrtplib)
 add_subdirectory(swagger)
 add_subdirectory(devices)
-
-# strange symbol dependency
-#  mainbench.obj : error LNK2001: unresolved external
-#  symbol "public: static float const decimation_scale<12>::scaleIn" (?scaleIn@?$decimation_scale@$0M@@@2MB)
-if(NOT WIN32)
-  add_subdirectory(sdrbench)
-endif()
+add_subdirectory(sdrbench)
 
 if (BUILD_GUI)
     add_subdirectory(sdrgui)
@@ -494,21 +488,19 @@ else()
 endif()
 
 ############ build sdrangel benchmark ################
-if(NOT WIN32)
-  set(sdrangelbench_SOURCES
-    appbench/main.cpp
-  )
+set(sdrangelbench_SOURCES
+  appbench/main.cpp
+)
 
-  add_executable(sdrangelbench
-    ${sdrangelbench_SOURCES}
-  )
+add_executable(sdrangelbench
+  ${sdrangelbench_SOURCES}
+)
 
-  target_link_libraries(sdrangelbench
-    Qt5::Multimedia
-    sdrbench
-    logging
-  )
-endif()
+target_link_libraries(sdrangelbench
+  Qt5::Multimedia
+  sdrbench
+  logging
+)
 ############ build sdrangel gui ################
 if (BUILD_GUI)
     set(sdrangel_SOURCES
@@ -554,9 +546,7 @@ if (BUILD_SERVER)
 endif()
 
 ############ install ##################
-if(NOT WIN32)
-  install(TARGETS sdrangelbench DESTINATION ${INSTALL_BIN_DIR})
-endif()
+install(TARGETS sdrangelbench DESTINATION ${INSTALL_BIN_DIR})
 if (BUILD_GUI)
       install(TARGETS ${CMAKE_PROJECT_NAME} DESTINATION ${INSTALL_BIN_DIR})
 endif()
diff --git a/appbench/main.cpp b/appbench/main.cpp
index 0c91a875c..be8005a0d 100644
--- a/appbench/main.cpp
+++ b/appbench/main.cpp
@@ -21,20 +21,22 @@
 #include <QSysInfo>
 #include <QTimer>
 
-#include <signal.h>
-#include <unistd.h>
 #include <vector>
 
 #include "loggerwithfile.h"
 #include "mainbench.h"
 #include "dsp/dsptypes.h"
 
+#ifndef _WIN32
+
+#include <signal.h>
+#include <unistd.h>
+
 void handler(int sig) {
     fprintf(stderr, "quit the application by signal(%d).\n", sig);
     QCoreApplication::quit();
 }
 
-#ifndef _WIN32
 void catchUnixSignals(const std::vector<int>& quitSignals) {
     sigset_t blocking_mask;
     sigemptyset(&blocking_mask);
diff --git a/sdrbase/CMakeLists.txt b/sdrbase/CMakeLists.txt
index 9e3fb0353..93fe2a50a 100644
--- a/sdrbase/CMakeLists.txt
+++ b/sdrbase/CMakeLists.txt
@@ -99,7 +99,6 @@ set(sdrbase_SOURCES
     dsp/channelsamplesource.cpp
     dsp/cwkeyer.cpp
     dsp/cwkeyersettings.cpp
-    dsp/decimatorsif.cpp
     dsp/decimatorsff.cpp
     dsp/decimatorsfi.cpp
     dsp/decimatorc.cpp
diff --git a/sdrbase/dsp/decimatorsif.cpp b/sdrbase/dsp/decimatorsif.cpp
deleted file mode 100644
index 5a443642f..000000000
--- a/sdrbase/dsp/decimatorsif.cpp
+++ /dev/null
@@ -1,23 +0,0 @@
-///////////////////////////////////////////////////////////////////////////////////
-// Copyright (C) 2018 Edouard Griffiths, F4EXB                                   //
-//                                                                               //
-// This program is free software; you can redistribute it and/or modify          //
-// it under the terms of the GNU General Public License as published by          //
-// the Free Software Foundation as version 3 of the License, or                  //
-// (at your option) any later version.                                           //
-//                                                                               //
-// This program is distributed in the hope that it will be useful,               //
-// but WITHOUT ANY WARRANTY; without even the implied warranty of                //
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                  //
-// GNU General Public License V3 for more details.                               //
-//                                                                               //
-// You should have received a copy of the GNU General Public License             //
-// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
-///////////////////////////////////////////////////////////////////////////////////
-
-#include "decimatorsif.h"
-
-const float decimation_scale<8>::scaleIn = 1.0/128.0;
-const float decimation_scale<12>::scaleIn = 1.0/2048.0;
-const float decimation_scale<16>::scaleIn = 1.0/32768.0;
-
diff --git a/sdrbase/dsp/decimatorsif.h b/sdrbase/dsp/decimatorsif.h
index 90a7975bf..24ab35d56 100644
--- a/sdrbase/dsp/decimatorsif.h
+++ b/sdrbase/dsp/decimatorsif.h
@@ -26,31 +26,9 @@
 template<uint InputBits>
 struct decimation_scale
 {
-    static const float scaleIn;
+    static constexpr float scaleIn = 1.0f / (1 << (InputBits - 1));
 };
 
-template<uint InputBits>
-const float decimation_scale<InputBits>::scaleIn = 1.0;
-
-template<>
-struct decimation_scale<8>
-{
-    static const float scaleIn;
-};
-
-template<>
-struct decimation_scale<12>
-{
-    static const float scaleIn;
-};
-
-template<>
-struct decimation_scale<16>
-{
-    static const float scaleIn;
-};
-
-
 template<typename T, uint InputBits, bool IQOrder>
 class DecimatorsIF {
 public:
diff --git a/sdrbench/mainbench.h b/sdrbench/mainbench.h
index c92f603f1..20510a39e 100644
--- a/sdrbench/mainbench.h
+++ b/sdrbench/mainbench.h
@@ -29,6 +29,7 @@
 #include "dsp/decimatorsfi.h"
 #include "dsp/decimatorsff.h"
 #include "parserbench.h"
+#include "export.h"
 
 namespace qtwebapp {
     class LoggerWithFile;
@@ -38,8 +39,8 @@ class MainBench: public QObject {
     Q_OBJECT
 
 public:
-    explicit MainBench(qtwebapp::LoggerWithFile *logger, const ParserBench& parser, QObject *parent = 0);
-    ~MainBench();
+    SDRBASE_API explicit MainBench(qtwebapp::LoggerWithFile *logger, const ParserBench& parser, QObject *parent = 0);
+    SDRBASE_API ~MainBench();
 
 public slots:
     void run();
diff --git a/sdrbench/parserbench.h b/sdrbench/parserbench.h
index 013578382..f9ae7000f 100644
--- a/sdrbench/parserbench.h
+++ b/sdrbench/parserbench.h
@@ -22,6 +22,8 @@
 #include <QCommandLineParser>
 #include <stdint.h>
 
+#include "export.h"
+
 class ParserBench
 {
 public:
@@ -36,10 +38,10 @@ public:
         TestAMBE
     } TestType;
 
-    ParserBench();
-    ~ParserBench();
+    SDRBASE_API ParserBench();
+    SDRBASE_API ~ParserBench();
 
-    void parse(const QCoreApplication& app);
+    SDRBASE_API void parse(const QCoreApplication& app);
 
     const QString& getTestStr() const { return m_testStr; }
     TestType getTestType() const;