diff --git a/test/leak/sharp.supp b/test/leak/sharp.supp
index e1a0fdca..dc51a152 100644
--- a/test/leak/sharp.supp
+++ b/test/leak/sharp.supp
@@ -196,6 +196,18 @@
   ...
   fun:FcInitLoadConfigAndFonts
 }
+{
+  leak_fontconfig_doContent
+  Memcheck:Leak
+  match-leak-kinds: definite
+  fun:malloc
+  ...
+  fun:doContent
+  fun:doProlog
+  fun:prologInitProcessor
+  fun:XML_ParseBuffer
+  obj:*/libfontconfig.so.*
+}
 
 # libvips
 {