1 files changed, 1 insertions, 2 deletions

diff --git a/apps/plugins/chessbox/Makefile b/apps/plugins/chessbox/Makefile
index be75b2c5e1..05b6d8f6a7 100644
--- a/apps/plugins/chessbox/Makefile
+++ b/apps/plugins/chessbox/Makefile
@@ -9,7 +9,7 @@
 
 INCLUDES = -I$(APPSDIR) -I.. -I. -I$(FIRMDIR)/include -I$(FIRMDIR)/export \
  -I$(FIRMDIR)/common -I$(FIRMDIR)/drivers -I$(OUTDIR) -I$(BUILDDIR)
-CFLAGS = $(GCCOPTS) -O3 $(INCLUDES) $(TARGET) $(EXTRA_DEFINES) \
+CFLAGS = $(GCCOPTS) $(INCLUDES) $(TARGET) $(EXTRA_DEFINES) \
  -DTARGET_ID=$(TARGET_ID) -DMEM=${MEMORYSIZE} -DPLUGIN
 
 ifdef APPEXTRA
@@ -109,4 +109,3 @@ clean:
         @rm -f $(OBJDIR)/chessbox.* $(DEPFILE)
 
 -include $(DEPFILE)
-