diff --git a/ext/com_dotnet/com_com.c b/ext/com_dotnet/com_com.c
index fd2d1ee9a43..05c2f98e903 100644
--- a/ext/com_dotnet/com_com.c
+++ b/ext/com_dotnet/com_com.c
@@ -306,7 +306,7 @@ PHP_FUNCTION(com_get_active_object)
 		if (FAILED(res)) {
 			php_com_throw_exception(res, NULL);
 		} else {
-			res = IUnknown_QueryInterface(unk, &IID_IDispatch, &obj);
+			res = IUnknown_QueryInterface(unk, &IID_IDispatch, (void **) &obj);
 
 			if (FAILED(res)) {
 				php_com_throw_exception(res, NULL);
diff --git a/ext/com_dotnet/com_dotnet.c b/ext/com_dotnet/com_dotnet.c
index 3ce2daddaa7..f8b4a828e15 100644
--- a/ext/com_dotnet/com_dotnet.c
+++ b/ext/com_dotnet/com_dotnet.c
@@ -303,7 +303,7 @@ PHP_METHOD(dotnet, __construct)
 		IObjectHandle *handle = NULL;
 
 		where = "QI: IObjectHandle";
-		hr = IUnknown_QueryInterface(unk, &IID_IObjectHandle, &handle);
+		hr = IUnknown_QueryInterface(unk, &IID_IObjectHandle, (void**) &handle);
 
 		if (SUCCEEDED(hr)) {
 			where = "IObjectHandle_Unwrap";
@@ -312,7 +312,7 @@ PHP_METHOD(dotnet, __construct)
 
 				if (V_VT(&unwrapped) == VT_UNKNOWN) {
 					where = "Unwrapped, QI for IDispatch";
-					hr = IUnknown_QueryInterface(V_UNKNOWN(&unwrapped), &IID_IDispatch, &V_DISPATCH(&obj->v));
+					hr = IUnknown_QueryInterface(V_UNKNOWN(&unwrapped), &IID_IDispatch, (void **) &V_DISPATCH(&obj->v));
 
 					if (SUCCEEDED(hr)) {
 						V_VT(&obj->v) = VT_DISPATCH;
diff --git a/ext/com_dotnet/com_persist.c b/ext/com_dotnet/com_persist.c
index a4544cd8854..c2d227eaa37 100644
--- a/ext/com_dotnet/com_persist.c
+++ b/ext/com_dotnet/com_persist.c
@@ -290,7 +290,7 @@ static zend_class_entry *helper_ce;
 static inline HRESULT get_persist_stream(php_com_persist_helper *helper)
 {
 	if (!helper->ips && helper->unk) {
-		return IUnknown_QueryInterface(helper->unk, &IID_IPersistStream, &helper->ips);
+		return IUnknown_QueryInterface(helper->unk, &IID_IPersistStream, (void **) &helper->ips);
 	}
 	return helper->ips ? S_OK : E_NOTIMPL;
 }
@@ -298,7 +298,7 @@ static inline HRESULT get_persist_stream(php_com_persist_helper *helper)
 static inline HRESULT get_persist_stream_init(php_com_persist_helper *helper)
 {
 	if (!helper->ipsi && helper->unk) {
-		return IUnknown_QueryInterface(helper->unk, &IID_IPersistStreamInit, &helper->ipsi);
+		return IUnknown_QueryInterface(helper->unk, &IID_IPersistStreamInit, (void **) &helper->ipsi);
 	}
 	return helper->ipsi ? S_OK : E_NOTIMPL;
 }
@@ -306,7 +306,7 @@ static inline HRESULT get_persist_stream_init(php_com_persist_helper *helper)
 static inline HRESULT get_persist_file(php_com_persist_helper *helper)
 {
 	if (!helper->ipf && helper->unk) {
-		return IUnknown_QueryInterface(helper->unk, &IID_IPersistFile, &helper->ipf);
+		return IUnknown_QueryInterface(helper->unk, &IID_IPersistFile, (void **) &helper->ipf);
 	}
 	return helper->ipf ? S_OK : E_NOTIMPL;
 }
@@ -545,7 +545,7 @@ CPH_METHOD(LoadFromStream)
 		IDispatch *disp = NULL;
 
 		/* we need to create an object and load using OleLoadFromStream */
-		res = OleLoadFromStream(stm, &IID_IDispatch, &disp);
+		res = OleLoadFromStream(stm, &IID_IDispatch, (void **) &disp);
 
 		if (SUCCEEDED(res)) {
 			php_com_wrap_dispatch(return_value, disp, COMG(code_page));
diff --git a/ext/com_dotnet/com_variant.c b/ext/com_dotnet/com_variant.c
index 2e254e51a6c..23cbd078fb4 100644
--- a/ext/com_dotnet/com_variant.c
+++ b/ext/com_dotnet/com_variant.c
@@ -60,7 +60,7 @@ static void safe_array_from_zval(VARIANT *v, zval *z, int codepage)
 	sa = SafeArrayCreate(VT_VARIANT, 1, &bound);
 
 	/* get a lock on the array itself */
-	SafeArrayAccessData(sa, &va);
+	SafeArrayAccessData(sa, (void **) &va);
 	va = (VARIANT*)sa->pvData;
 
 	/* now fill it in */
@@ -247,7 +247,7 @@ PHP_COM_DOTNET_API zend_result php_com_zval_from_variant(zval *z, VARIANT *v, in
 			if (V_UNKNOWN(v) != NULL) {
 				IDispatch *disp;
 
-				if (SUCCEEDED(IUnknown_QueryInterface(V_UNKNOWN(v), &IID_IDispatch, &disp))) {
+				if (SUCCEEDED(IUnknown_QueryInterface(V_UNKNOWN(v), &IID_IDispatch, (void **) &disp))) {
 					php_com_wrap_dispatch(z, disp, codepage);
 					IDispatch_Release(disp);
 				} else {
diff --git a/ext/opcache/shared_alloc_win32.c b/ext/opcache/shared_alloc_win32.c
index 331aff32c98..d9a35f7d7f5 100644
--- a/ext/opcache/shared_alloc_win32.c
+++ b/ext/opcache/shared_alloc_win32.c
@@ -47,7 +47,7 @@ static void *mapping_base;
 static void zend_win_error_message(int type, char *msg, int err)
 {
 	HANDLE h;
-	char *ev_msgs[2];
+	const char *ev_msgs[2];
 	char *buf = php_win32_error_to_msg(err);
 
 	h = RegisterEventSource(NULL, TEXT(ACCEL_EVENT_SOURCE));
diff --git a/sapi/phpdbg/phpdbg_win.c b/sapi/phpdbg/phpdbg_win.c
index 349d9c6261e..0a61f78c039 100644
--- a/sapi/phpdbg/phpdbg_win.c
+++ b/sapi/phpdbg/phpdbg_win.c
@@ -20,7 +20,7 @@
 #include "phpdbg.h"
 
 int mprotect(void *addr, size_t size, int protection) {
-	int var;
+	DWORD var;
 	return (int)VirtualProtect(addr, size, protection == (PROT_READ | PROT_WRITE) ? PAGE_READWRITE : PAGE_READONLY, &var);
 }