diff --git a/lib/libesp32/berry/Makefile b/lib/libesp32/berry/Makefile
index 4442e295c..3f132d38f 100755
--- a/lib/libesp32/berry/Makefile
+++ b/lib/libesp32/berry/Makefile
@@ -1,4 +1,4 @@
-CFLAGS      = -Wall -Wextra -std=c99 -O2 -Wno-zero-length-array -Wno-empty-translation-unit -DUSE_BERRY_INT64
+CFLAGS      = -Wall -Wextra -std=c99 -O2 -Wno-zero-length-array -Wno-empty-translation-unit -ffp-contract=off -DUSE_BERRY_INT64
 DEBUG_FLAGS = -O0 -g -DBE_DEBUG
 TEST_FLAGS  = $(DEBUG_FLAGS) --coverage -fno-omit-frame-pointer -fsanitize=address -fsanitize=undefined
 LIBS        = -lm