diff --git a/build.symbian/libpassthroughcodec.mmp b/build.symbian/libpassthroughcodec.mmp
index c4fb277..3a19117 100644
--- a/build.symbian/libpassthroughcodec.mmp
+++ b/build.symbian/libpassthroughcodec.mmp
@@ -9,6 +9,7 @@
 // GCCE optimization setting
 //
 OPTION		GCCE -O2 -fno-unit-at-a-time
+OPTION          ARMCC --gnu
 
 //
 // Passthrough codecs wrapper for pjmedia-codec