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-rw-r--r--ports/webassembly/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/ports/webassembly/Makefile b/ports/webassembly/Makefile
index 09660cd39..db42d0096 100644
--- a/ports/webassembly/Makefile
+++ b/ports/webassembly/Makefile
@@ -15,7 +15,7 @@ INC += -I$(TOP)
INC += -I$(BUILD)
CFLAGS += -std=c99 -Wall -Werror -Wdouble-promotion -Wfloat-conversion
-CFLAGS += -O3 -DNDEBUG
+CFLAGS += -Os -DNDEBUG
CFLAGS += $(INC)
SRC_SHARED = $(addprefix shared/,\