diff --git a/makefile.unix b/makefile.unix
index 61b925e3bc6..f1ffc2f7ed5 100644
--- a/makefile.unix
+++ b/makefile.unix
@@ -32,7 +32,8 @@ LIBS+= \
  -Wl,-Bdynamic \
    -l gthread-2.0 \
    -l z \
-   -l dl
+   -l dl \
+   -l pthread
 
 
 DEBUGFLAGS=-g -D__WXDEBUG__