diff --git a/Makefile b/Makefile
index db38f47..6390cc6 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 # LDFLAGS       linker flags for linking all binaries
 
 # Initialize some variables if not set
-LDFLAGS ?=
+LDFLAGS += -lm
 CFLAGS ?= -O2 -Wall -Wextra -Wno-unused-parameter
 CC ?= $(CROSSCOMPILE)-gcc
 
diff --git a/src/rpi_ws281x b/src/rpi_ws281x
index 428026e..0814bae 160000
--- a/src/rpi_ws281x
+++ b/src/rpi_ws281x
@@ -1 +1 @@
-Subproject commit 428026eb37f6caad247690a4d37d6ad693f1e487
+Subproject commit 0814bae544f0184ab1600bc2660486874eef5970