diff --git a/CMakeLists.txt b/CMakeLists.txt
index f86368e33d..2165fa07ae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -651,6 +651,9 @@ if (WIN32)
         4251 # class 'XXXX' needs to have dll-interface to be used by clients of class 'YYYY'
         4275 # non dll-interface struct 'XXXX' used as base for dll-interface class 'YYYY'
 
+        # caused by boost
+        4191 # 'type cast' : unsafe conversion (1.56, thread_primitives.hpp, normally off)
+
         # OpenMW specific warnings
         4099 # Type mismatch, declared class or struct is defined with other type
         4100 # Unreferenced formal parameter (-Wunused-parameter)
@@ -694,7 +697,9 @@ if (WIN32)
         set_target_properties(esmtool PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
     endif (BUILD_ESMTOOL)
     if (BUILD_OPENCS)
-        set_target_properties(opencs PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
+        # QT triggers an informational warning that the object layout may differ when compiled with /vd2
+        set(OPENCS_WARNINGS "${WARNINGS} ${MT_BUILD} /wd4435")
+        set_target_properties(opencs PROPERTIES COMPILE_FLAGS ${OPENCS_WARNINGS})
     endif (BUILD_OPENCS)
     if (BUILD_MWINIIMPORTER)
         set_target_properties(mwiniimport PROPERTIES COMPILE_FLAGS "${WARNINGS} ${MT_BUILD}")
diff --git a/components/compiler/lineparser.cpp b/components/compiler/lineparser.cpp
index c5e236f147..7d554f2ec9 100644
--- a/components/compiler/lineparser.cpp
+++ b/components/compiler/lineparser.cpp
@@ -311,7 +311,7 @@ namespace Compiler
                         extensions->generateInstructionCode (keyword, mCode, mLiterals,
                             mExplicit, optionals);
                     }
-                    catch (const SourceException& exception)
+                    catch (const SourceException&)
                     {
                         // Ignore argument exceptions for positioncell.
                         /// \todo add option to disable this
diff --git a/plugins/mygui_resource_plugin/CMakeLists.txt b/plugins/mygui_resource_plugin/CMakeLists.txt
index 7288fd4b67..72965c9178 100644
--- a/plugins/mygui_resource_plugin/CMakeLists.txt
+++ b/plugins/mygui_resource_plugin/CMakeLists.txt
@@ -15,6 +15,14 @@ add_library(${MYGUI_RESOURCE_PLUGIN_LIBRARY}
     ${MYGUI_RESOURCE_PLUGIN_SOURCES}
     )
 
+if(WIN32)
+  if(MSVC)
+     # from top-level CMakelists.txt:
+     # 4305 - Truncating value (double to float, for example)
+    set_target_properties(${MYGUI_RESOURCE_PLUGIN_LIBRARY} PROPERTIES COMPILE_FLAGS "/wd4305")
+  endif(MSVC)
+endif(WIN32)
+
 set_target_properties(${MYGUI_RESOURCE_PLUGIN_LIBRARY} PROPERTIES PREFIX "")
 
 target_link_libraries(${MYGUI_RESOURCE_PLUGIN_LIBRARY}