diff --git a/codecs/lpc10/Makefile b/codecs/lpc10/Makefile
index 76561a7fbf..cce4c4d925 100755
--- a/codecs/lpc10/Makefile
+++ b/codecs/lpc10/Makefile
@@ -22,7 +22,7 @@ LIB_TARGET_DIR = .
 # 
 
 WARNINGS = -Wall -Wno-comment -Wno-error
-CFLAGS = -O3 -I$(LIB_TARGET_DIR) $(WARNINGS)
+CFLAGS = -O6 -mpentium -I$(LIB_TARGET_DIR) $(WARNINGS)
 
 LIB = $(LIB_TARGET_DIR)/liblpc10.a