diff --git a/projects/rccl/src/include/BfdBacktrace.hpp b/projects/rccl/src/include/BfdBacktrace.hpp
index ef0cc42077..9e24acb3de 100644
--- a/projects/rccl/src/include/BfdBacktrace.hpp
+++ b/projects/rccl/src/include/BfdBacktrace.hpp
@@ -17,6 +17,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 #ifdef HAVE_CPLUS_DEMANGLE
 #define HAVE_DECL_BASENAME 1