diff --git a/cmake/VSTConfig.cmake b/cmake/VSTConfig.cmake
index 26d642d7..04ded138 100644
--- a/cmake/VSTConfig.cmake
+++ b/cmake/VSTConfig.cmake
@@ -3,24 +3,34 @@ set (VSTPLUGIN_VENDOR          "Paul Ferrand")
 set (VSTPLUGIN_URL             "http://sfztools.github.io/sfizz")
 set (VSTPLUGIN_EMAIL           "paul@ferrand.cc")
 
+# The variable CMAKE_SYSTEM_PROCESSOR is incorrect on Visual studio...
+# see https://gitlab.kitware.com/cmake/cmake/issues/15170
+
+if(MSVC)
+    set(VST3_SYSTEM_PROCESSOR "${MSVC_CXX_ARCHITECTURE_ID}")
+else()
+    set(VST3_SYSTEM_PROCESSOR "${CMAKE_SYSTEM_PROCESSOR}")
+endif()
+
+message(STATUS "The system architecture is: ${VST3_SYSTEM_PROCESSOR}")
+
 # --- VST3 Bundle architecture ---
 if(NOT VST3_PACKAGE_ARCHITECTURE)
     if(APPLE)
         # VST3 packages are universal on Apple, architecture string not needed
     else()
-        if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|amd64|AMD64)$")
+        if(VST3_SYSTEM_PROCESSOR MATCHES "^(x86_64|amd64|AMD64)$")
             set(VST3_PACKAGE_ARCHITECTURE "x86_64")
-        elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(i.86|x86)$")
+        elseif(VST3_SYSTEM_PROCESSOR MATCHES "^(i.86|x86)$")
             if(WIN32)
                 set(VST3_PACKAGE_ARCHITECTURE "x86")
             else()
                 set(VST3_PACKAGE_ARCHITECTURE "i386")
             endif()
         else()
-            message(FATAL_ERROR "We don't know this architecture for VST3: ${CMAKE_SYSTEM_PROCESSOR}.")
+            message(FATAL_ERROR "We don't know this architecture for VST3: ${VST3_SYSTEM_PROCESSOR}.")
         endif()
     endif()
 endif()
 
-message(STATUS "The system architecture is: ${CMAKE_SYSTEM_PROCESSOR}")
 message(STATUS "The VST3 architecture is deduced as: ${VST3_PACKAGE_ARCHITECTURE}")