diff --git a/include/wx/msw/private/webview_ie.h b/include/wx/msw/private/webview_ie.h
index 4d94911aaa..091167f17b 100644
--- a/include/wx/msw/private/webview_ie.h
+++ b/include/wx/msw/private/webview_ie.h
@@ -122,7 +122,7 @@ public:
             DWORD cchResult, DWORD *pcchResult,
             DWORD dwReserved) wxOVERRIDE;
     HRESULT STDMETHODCALLTYPE ParseUrl(
-            LPCWSTR pwzUrl, PARSEACTION ParseAction,
+            LPCWSTR pwzUrl, wxPARSEACTION ParseAction,
             DWORD dwParseFlags, LPWSTR pwzResult,
             DWORD cchResult, DWORD *pcchResult,
             DWORD dwReserved) wxOVERRIDE;
@@ -131,7 +131,7 @@ public:
             LPCWSTR pwzUrl2,
             DWORD dwCompareFlags) wxOVERRIDE;
     HRESULT STDMETHODCALLTYPE QueryInfo(
-            LPCWSTR pwzUrl, QUERYOPTION OueryOption,
+            LPCWSTR pwzUrl, wxQUERYOPTION OueryOption,
             DWORD dwQueryFlags, LPVOID pBuffer,
             DWORD cbBuffer, DWORD *pcbBuf,
             DWORD dwReserved) wxOVERRIDE;
diff --git a/include/wx/msw/private/webview_missing.h b/include/wx/msw/private/webview_missing.h
index e3f70c3300..6d3196c10f 100644
--- a/include/wx/msw/private/webview_missing.h
+++ b/include/wx/msw/private/webview_missing.h
@@ -27,6 +27,10 @@ struct IHTMLDocument2;
 #define REFRESH_COMPLETELY 3
 #endif
 
+#ifndef INET_E_DEFAULT_ACTION
+#define INET_E_DEFAULT_ACTION ((HRESULT)0x800C0011L)
+#endif
+
 typedef enum __wxMIDL_IBindStatusCallback_0006
 {
     wxBSCF_FIRSTDATANOTIFICATION = 0x1,
@@ -136,11 +140,26 @@ public:
             DWORD dwReserved) = 0;
 };
 
+// This interface uses a couple of enums which are not defined in old MinGW
+// SDK headers, but we don't have any reliable way to test if they're actually
+// defined, so define our own enums, containing just the values we need: this
+// compiles everywhere and is ABI-compatible with the real enums.
+enum wxPARSEACTION
+{
+    wxPARSE_SECURITY_URL = 3,
+    wxPARSE_SECURITY_DOMAIN = 17
+};
+
+enum wxQUERYOPTION
+{
+    // We don't actually need any values in this one.
+};
+
 class wxIInternetProtocolInfo : public IUnknown
 {
 public:
     virtual HRESULT STDMETHODCALLTYPE ParseUrl(LPCWSTR pwzUrl,
-        PARSEACTION ParseAction,
+        wxPARSEACTION ParseAction,
         DWORD dwParseFlags,
         LPWSTR pwzResult,
         DWORD cchResult,
@@ -160,7 +179,7 @@ public:
         DWORD dwCompareFlags) = 0;
 
     virtual HRESULT STDMETHODCALLTYPE QueryInfo(LPCWSTR pwzUrl,
-        QUERYOPTION OueryOption,
+        wxQUERYOPTION OueryOption,
         DWORD dwQueryFlags,
         LPVOID pBuffer,
         DWORD cbBuffer,
diff --git a/src/msw/webview_ie.cpp b/src/msw/webview_ie.cpp
index 6b7aba1922..839acc92f3 100644
--- a/src/msw/webview_ie.cpp
+++ b/src/msw/webview_ie.cpp
@@ -1762,7 +1762,7 @@ HRESULT STDMETHODCALLTYPE VirtualProtocol::CombineUrl(
 }
 
 HRESULT STDMETHODCALLTYPE VirtualProtocol::ParseUrl(
-        LPCWSTR pwzUrl, PARSEACTION ParseAction,
+        LPCWSTR pwzUrl, wxPARSEACTION ParseAction,
         DWORD dwParseFlags, LPWSTR pwzResult,
         DWORD cchResult, DWORD *pcchResult,
         DWORD dwReserved)
@@ -1777,8 +1777,8 @@ HRESULT STDMETHODCALLTYPE VirtualProtocol::ParseUrl(
 
     switch (ParseAction)
     {
-        case PARSE_SECURITY_URL:
-        case PARSE_SECURITY_DOMAIN:
+        case wxPARSE_SECURITY_URL:
+        case wxPARSE_SECURITY_DOMAIN:
         {
             LPWSTR Result = L"http://localhost";
             size_t Len = wcslen(Result);
@@ -1806,7 +1806,7 @@ HRESULT STDMETHODCALLTYPE VirtualProtocol::CompareUrl(
 }
 
 HRESULT STDMETHODCALLTYPE VirtualProtocol::QueryInfo(
-        LPCWSTR pwzUrl, QUERYOPTION OueryOption,
+        LPCWSTR pwzUrl, wxQUERYOPTION OueryOption,
         DWORD dwQueryFlags, LPVOID pBuffer,
         DWORD cbBuffer, DWORD *pcbBuf,
         DWORD dwReserved)