diff --git a/src/Makefile.am b/src/Makefile.am
index 497194b..84c31f0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -174,7 +174,8 @@ LIBS= \
 	@libxml2_LIBS@\
 	@libx11_LIBS@\
 	@sqlite3_LIBS@\
-	-lz
+	-lz\
+	-lm
 
 
 if HAVE_UNIQUE