diff --git a/Makefile b/Makefile
index 24f2571..cdb51b7 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ EXTRA_CFLAGS ?=
 EXTRA_LDFLAGS ?=
 CFLAGS := $(shell pkg-config --cflags glib-2.0 gio-2.0 gtk+-3.0 libxml-2.0) -Wall -g -ansi -std=c99 $(EXTRA_CFLAGS)
 LDFLAGS = $(EXTRA_LDFLAGS) -Wl,--as-needed
-LDADD := $(shell pkg-config --libs glib-2.0 gio-2.0 gtk+-3.0 gthread-2.0 alsa libxml-2.0) -lexpat 
+LDADD := $(shell pkg-config --libs glib-2.0 gio-2.0 gtk+-3.0 gthread-2.0 alsa libxml-2.0) -lexpat -lm
 OBJECTS = gdigi.o gui.o effects.o preset.o gtkknob.o preset_xml.o
 DEPFILES = $(foreach m,$(OBJECTS:.o=),.$(m).m)