diff --git a/code/nel/src/sound/driver/openal/CMakeLists.txt b/code/nel/src/sound/driver/openal/CMakeLists.txt
index 911214a57..22b3f4348 100644
--- a/code/nel/src/sound/driver/openal/CMakeLists.txt
+++ b/code/nel/src/sound/driver/openal/CMakeLists.txt
@@ -36,8 +36,11 @@ NL_ADD_LIB_SUFFIX(${NLDRV_AL_LIB})
 IF(WIN32)
   # Find and include EFX-Util on Windows.
   FIND_PACKAGE(EFXUtil)
-  INCLUDE_DIRECTORIES(${EFXUTIL_INCLUDE_DIR})
-  TARGET_LINK_LIBRARIES(${NLDRV_AL_LIB} ${EFXUTIL_LIBRARY})
+  IF(EFXUTIL_FOUND)
+    INCLUDE_DIRECTORIES(${EFXUTIL_INCLUDE_DIR})
+    TARGET_LINK_LIBRARIES(${NLDRV_AL_LIB} ${EFXUTIL_LIBRARY})
+    ADD_DEFINITIONS(-DEFX_CREATIVE_AVAILABLE=1)
+  ENDIF()
 ENDIF()
 
 IF(WITH_PCH)
diff --git a/code/nel/src/sound/driver/openal/ext_al.h b/code/nel/src/sound/driver/openal/ext_al.h
index 0b7eaa2bf..b87cf48f2 100644
--- a/code/nel/src/sound/driver/openal/ext_al.h
+++ b/code/nel/src/sound/driver/openal/ext_al.h
@@ -17,12 +17,12 @@
 #ifndef NL_EXT_AL_H
 #define NL_EXT_AL_H
 
-#ifdef NL_OS_WINDOWS
-#	define EFX_CREATIVE_AVAILABLE 1
-#	define EAX_AVAILABLE 0
-#else
-#	define EFX_CREATIVE_AVAILABLE 0
-#	define EAX_AVAILABLE 0
+#ifndef EFX_CREATIVE_AVAILABLE
+#define EFX_CREATIVE_AVAILABLE 0
+#endif
+
+#ifndef EAX_AVAILABLE
+#define EAX_AVAILABLE 0
 #endif
 
 #if EAX_AVAILABLE