diff --git a/FMControl.cpp b/FMControl.cpp
index e3836d7..68aeab8 100644
--- a/FMControl.cpp
+++ b/FMControl.cpp
@@ -66,9 +66,8 @@ bool CFMControl::writeModem(const unsigned char* data, unsigned int length)
     }
 
     // De-emphasise the data and any other processing needed (maybe a low-pass filter to remove the CTCSS)
-    for(unsigned int i = 0U; i < nSamples; i++) {
+    for (unsigned int i = 0U; i < nSamples; i++)
         samples[i] = m_deemphasis.filter(samples[i]);
-    }
 
     unsigned char out[350U];
     unsigned int nOut = 0U;
@@ -104,9 +103,8 @@ unsigned int CFMControl::readModem(unsigned char* data, unsigned int space)
     }
 
     // Pre-emphasise the data and other stuff.
-    for(unsigned int i = 0U; i < nSamples; i++) {
+    for (unsigned int i = 0U; i < nSamples; i++)
         samples[i] = m_preemphasis.filter(samples[i]);
-    }
 
     // Pack the floating point data (+1.0 to -1.0) to packed 12-bit samples (+2047 - -2048)
     unsigned int pack = 0U;
diff --git a/MMDVMHost.vcxproj b/MMDVMHost.vcxproj
index cb65730..63ba164 100644
--- a/MMDVMHost.vcxproj
+++ b/MMDVMHost.vcxproj
@@ -188,6 +188,7 @@
     <ClInclude Include="Hamming.h" />
     <ClInclude Include="DMRLookup.h" />
     <ClInclude Include="I2CController.h" />
+    <ClInclude Include="IIRDirectForm1Filter.h" />
     <ClInclude Include="LCDproc.h" />
     <ClInclude Include="Log.h" />
     <ClInclude Include="MMDVMHost.h" />
@@ -285,6 +286,7 @@
     <ClCompile Include="Golay24128.cpp" />
     <ClCompile Include="Hamming.cpp" />
     <ClCompile Include="I2CController.cpp" />
+    <ClCompile Include="IIRDirectForm1Filter.cpp" />
     <ClCompile Include="LCDproc.cpp" />
     <ClCompile Include="Log.cpp" />
     <ClCompile Include="MMDVMHost.cpp" />
diff --git a/MMDVMHost.vcxproj.filters b/MMDVMHost.vcxproj.filters
index 4c0b48f..8dc6f12 100644
--- a/MMDVMHost.vcxproj.filters
+++ b/MMDVMHost.vcxproj.filters
@@ -305,6 +305,9 @@
     <ClInclude Include="FMControl.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="IIRDirectForm1Filter.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="BPTC19696.cpp">
@@ -574,5 +577,8 @@
     <ClCompile Include="FMControl.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="IIRDirectForm1Filter.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file