diff --git a/src/libCom/Makefile b/src/libCom/Makefile
index 93168fe36..0cdb34fe6 100644
--- a/src/libCom/Makefile
+++ b/src/libCom/Makefile
@@ -41,6 +41,7 @@ INC += epicsAlgorithm.h
 INC += epicsExcept.h
 INC += epicsList.h
 INC += epicsListBase.h
+INC += epics_auto_ptr.h
 SRCS += epicsListBase.cpp
 
 # From cxxTemplates