1 files changed, 1 insertions, 1 deletions
diff --git a/makefile.mingw b/makefile.mingw
index 449a96072c..ee63d11ead 100644
--- a/makefile.mingw
+++ b/makefile.mingw
@@ -29,7 +29,7 @@ LIBS= \
 
 WXDEFS=-DWIN32 -D__WXMSW__ -D_WINDOWS -DNOPCH
 DEBUGFLAGS=-g -D__WXDEBUG__
-CFLAGS=-mthreads -O0 -w -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(WXDEFS) $(INCLUDEPATHS)
+CFLAGS=-mthreads -O2 -w -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(WXDEFS) $(INCLUDEPATHS)
 HEADERS=headers.h strlcpy.h serialize.h uint256.h util.h key.h bignum.h base58.h \
     script.h db.h net.h irc.h main.h rpc.h uibase.h ui.h init.h sha.h