diff --git a/dlls/mshtml/htmlembed.c b/dlls/mshtml/htmlembed.c
index a06f08e3b1d..54070ed6d69 100644
--- a/dlls/mshtml/htmlembed.c
+++ b/dlls/mshtml/htmlembed.c
@@ -227,14 +227,13 @@ static HRESULT HTMLEmbedElement_QI(HTMLDOMNode *iface, REFIID riid, void **ppv)
 {
     HTMLEmbedElement *This = impl_from_HTMLDOMNode(iface);
 
+    TRACE("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
+
     if(IsEqualGUID(&IID_IUnknown, riid)) {
-        TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
         *ppv = &This->IHTMLEmbedElement_iface;
     }else if(IsEqualGUID(&IID_IDispatch, riid)) {
-        TRACE("(%p)->(IID_IDispatch %p)\n", This, ppv);
         *ppv = &This->IHTMLEmbedElement_iface;
     }else if(IsEqualGUID(&IID_IHTMLEmbedElement, riid)) {
-        TRACE("(%p)->(IID_IHTMLEmbedElement %p)\n", This, ppv);
         *ppv = &This->IHTMLEmbedElement_iface;
     }else {
         return HTMLElement_QI(&This->element.node, riid, ppv);
diff --git a/dlls/mshtml/htmlobject.c b/dlls/mshtml/htmlobject.c
index 2633f481c99..0e2033e332a 100644
--- a/dlls/mshtml/htmlobject.c
+++ b/dlls/mshtml/htmlobject.c
@@ -645,21 +645,18 @@ static HRESULT HTMLObjectElement_QI(HTMLDOMNode *iface, REFIID riid, void **ppv)
 {
     HTMLObjectElement *This = impl_from_HTMLDOMNode(iface);
 
+    TRACE("(%p)->(%s %p)\n", This, debugstr_mshtml_guid(riid), ppv);
+
     if(IsEqualGUID(&IID_IUnknown, riid)) {
-        TRACE("(%p)->(IID_IUnknown %p)\n", This, ppv);
         *ppv = &This->IHTMLObjectElement_iface;
     }else if(IsEqualGUID(&IID_IDispatch, riid)) {
-        TRACE("(%p)->(IID_IDispatch %p)\n", This, ppv);
         *ppv = &This->IHTMLObjectElement_iface;
     }else if(IsEqualGUID(&IID_IHTMLObjectElement, riid)) {
-        TRACE("(%p)->(IID_IHTMLObjectElement %p)\n", This, ppv);
         *ppv = &This->IHTMLObjectElement_iface;
     }else if(IsEqualGUID(&IID_IHTMLObjectElement2, riid)) {
-        TRACE("(%p)->(IID_IHTMLObjectElement2 %p)\n", This, ppv);
         *ppv = &This->IHTMLObjectElement2_iface;
     }else if(IsEqualGUID(&IID_HTMLPluginContainer, riid)) {
         /* Special pseudo-interface returning HTMLPluginContainse struct. */
-        TRACE("(%p)->(IID_HTMLPluginContainer %p)\n", This, ppv);
         *ppv = &This->plugin_container;
         node_addref(&This->plugin_container.element.node);
         return S_OK;
diff --git a/dlls/mshtml/main.c b/dlls/mshtml/main.c
index 8d9f1ac2c0c..8938f01e157 100644
--- a/dlls/mshtml/main.c
+++ b/dlls/mshtml/main.c
@@ -42,6 +42,7 @@
 #define INIT_GUID
 #include "mshtml_private.h"
 #include "resource.h"
+#include "pluginhost.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(mshtml);
 
@@ -540,6 +541,7 @@ const char *debugstr_mshtml_guid(const GUID *iid)
     X(DIID_HTMLDocumentEvents2);
     X(DIID_HTMLTableEvents);
     X(DIID_HTMLTextContainerEvents);
+    X(IID_HTMLPluginContainer);
     X(IID_IConnectionPoint);
     X(IID_IConnectionPointContainer);
     X(IID_ICustomDoc);
diff --git a/dlls/mshtml/pluginhost.c b/dlls/mshtml/pluginhost.c
index b6fcf72c79f..7b1133dc767 100644
--- a/dlls/mshtml/pluginhost.c
+++ b/dlls/mshtml/pluginhost.c
@@ -37,9 +37,6 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(mshtml);
 
-const IID IID_HTMLPluginContainer =
-    {0xbd7a6050,0xb373,0x4f6f,{0xa4,0x93,0xdd,0x40,0xc5,0x23,0xa8,0x6a}};
-
 static BOOL check_load_safety(PluginHost *host)
 {
     DWORD policy_size, policy;
diff --git a/dlls/mshtml/pluginhost.h b/dlls/mshtml/pluginhost.h
index 0460c3c33e0..5135c336d26 100644
--- a/dlls/mshtml/pluginhost.h
+++ b/dlls/mshtml/pluginhost.h
@@ -58,6 +58,8 @@ struct HTMLPluginContainer {
     DWORD props_len;
 };
 
+DEFINE_GUID(IID_HTMLPluginContainer, 0xbd7a6050,0xb373,0x4f6f,0xa4,0x93,0xdd,0x40,0xc5,0x23,0xa8,0x6a);
+
 extern const IID IID_HTMLPluginContainer DECLSPEC_HIDDEN;
 
 HRESULT create_plugin_host(HTMLDocumentNode*,HTMLPluginContainer*) DECLSPEC_HIDDEN;