--- tests/Makefile.in	2011-01-13 23:42:56.000000000 +0100
+++ tests/Makefile.in	2012-11-17 12:00:41.596274499 +0100
@@ -219,7 +219,8 @@ 
 	$(top_builddir)/src/libgdiplus.la
 
 LDADDS = \
-	$(top_builddir)/src/libgdiplus.la
+	$(top_builddir)/src/libgdiplus.la	\
+	-lm
 
 testgdi_DEPENDENCIES = $(TEST_DEPS)
 testgdi_LDADD = $(LDADDS)