diff --git a/visualc/vngspice.vcxproj b/visualc/vngspice.vcxproj
index 3d14b4ed2..7b4d03160 100644
--- a/visualc/vngspice.vcxproj
+++ b/visualc/vngspice.vcxproj
@@ -1086,8 +1086,8 @@
     <ClInclude Include="..\src\maths\poly\polyderiv.h" />
     <ClInclude Include="..\src\maths\poly\polyeval.h" />
     <ClInclude Include="..\src\maths\poly\polyfit.h" />
-    <ClInclude Include="..\src\maths\sparse\spconfig.h" />
-    <ClInclude Include="..\src\maths\sparse\spdefs.h" />
+    <ClInclude Include="..\src\maths\sparse\spConfig.h" />
+    <ClInclude Include="..\src\maths\sparse\spDefs.h" />
     <ClInclude Include="..\src\misc\alloc.h" />
     <ClInclude Include="..\src\misc\dup2.h" />
     <ClInclude Include="..\src\misc\getopt_bsd.h" />
@@ -1620,14 +1620,14 @@
     <ClCompile Include="..\src\maths\poly\polyderiv.c" />
     <ClCompile Include="..\src\maths\poly\polyeval.c" />
     <ClCompile Include="..\src\maths\poly\polyfit.c" />
-    <ClCompile Include="..\src\maths\sparse\spalloc.c" />
-    <ClCompile Include="..\src\maths\sparse\spbuild.c" />
-    <ClCompile Include="..\src\maths\sparse\spextra.c" />
-    <ClCompile Include="..\src\maths\sparse\spfactor.c" />
-    <ClCompile Include="..\src\maths\sparse\spoutput.c" />
-    <ClCompile Include="..\src\maths\sparse\spsmp.c" />
-    <ClCompile Include="..\src\maths\sparse\spsolve.c" />
-    <ClCompile Include="..\src\maths\sparse\sputils.c" />
+    <ClCompile Include="..\src\maths\sparse\spAllocate.c" />
+    <ClCompile Include="..\src\maths\sparse\spBuild.c" />
+    <ClCompile Include="..\src\maths\sparse\spExtra.c" />
+    <ClCompile Include="..\src\maths\sparse\spFactor.c" />
+    <ClCompile Include="..\src\maths\sparse\spOutput.c" />
+    <ClCompile Include="..\src\maths\sparse\spSMP.c" />
+    <ClCompile Include="..\src\maths\sparse\spSolve.c" />
+    <ClCompile Include="..\src\maths\sparse\spUtils.c" />
     <ClCompile Include="..\src\misc\alloc.c" />
     <ClCompile Include="..\src\misc\dstring.c" />
     <ClCompile Include="..\src\misc\dup2.c" />