diff --git a/pipi/Makefile.am b/pipi/Makefile.am
index e774c01..094c8bd 100644
--- a/pipi/Makefile.am
+++ b/pipi/Makefile.am
@@ -39,8 +39,8 @@ libpipi_la_SOURCES = \
 	$(NULL)
 libpipi_la_CFLAGS = $(codec_cflags)
 libpipi_la_LDFLAGS = $(codec_libs) \
-	-no-undefined -version-number @LT_VERSION@
-
+	-no-undefined -version-number @LT_VERSION@ \
+	-lm
 # Submodules
 
 codec_cflags =