diff --git a/progs/tools/trace/gltrace_support.cc b/progs/tools/trace/gltrace_support.cc
index fb0404c450e..a557cb32d84 100644
--- a/progs/tools/trace/gltrace_support.cc
+++ b/progs/tools/trace/gltrace_support.cc
@@ -20,6 +20,7 @@
  */
 
 #include "gltrace_support.h"
+#include <assert.h>
 #include <sstream>
 #include <fstream>
 #include <iomanip>