diff --git a/reactos/lib/3rdparty/icu4ros/icu/source/common/umutex.c b/reactos/lib/3rdparty/icu4ros/icu/source/common/umutex.c
index 22396f5e1d9..299405a1f1a 100644
--- a/reactos/lib/3rdparty/icu4ros/icu/source/common/umutex.c
+++ b/reactos/lib/3rdparty/icu4ros/icu/source/common/umutex.c
@@ -104,7 +104,7 @@ static char              gMutexesInUse[MAX_MUTEXES];
  *
  *-------------------------------------------------------------*/
 static CRITICAL_SECTION  gMutexes[MAX_MUTEXES];
-static CRITICAL_SECTION  gGlobalWinMutex;
+/* static */ CRITICAL_SECTION  gGlobalWinMutex;
 
 
 /* On WIN32 mutexes are reentrant.  This makes it difficult to debug
diff --git a/reactos/lib/3rdparty/icu4ros/icu/source/common/unistr.cpp b/reactos/lib/3rdparty/icu4ros/icu/source/common/unistr.cpp
index d8bea383267..60099ab8499 100644
--- a/reactos/lib/3rdparty/icu4ros/icu/source/common/unistr.cpp
+++ b/reactos/lib/3rdparty/icu4ros/icu/source/common/unistr.cpp
@@ -1377,7 +1377,7 @@ The vector deleting destructor is already a part of UObject,
 but defining it here makes sure that it is included with this object file.
 This makes sure that static library dependencies are kept to a minimum.
 */
-static void uprv_UnicodeStringDummy(void) {
+/* static */ void uprv_UnicodeStringDummy(void) {
     U_NAMESPACE_USE
     delete [] (new UnicodeString[2]);
 }
diff --git a/reactos/lib/3rdparty/icu4ros/icu4ros.rbuild b/reactos/lib/3rdparty/icu4ros/icu4ros.rbuild
index 48a624efa86..26340684101 100644
--- a/reactos/lib/3rdparty/icu4ros/icu4ros.rbuild
+++ b/reactos/lib/3rdparty/icu4ros/icu4ros.rbuild
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../tools/rbuild/project.dtd">
-<module name="icu4ros" type="staticlibrary" allowwarnings="true">
+<module name="icu4ros" type="staticlibrary">
 	<define name="U_STATIC_IMPLEMENTATION" />
 	<define name="U_HAVE_INTTYPES_H" />
 	<define name="UCONFIG_NO_FILE_IO">1</define>