diff --git a/GNUmakefile b/GNUmakefile
index 564e45c..bf09467 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -12,6 +12,7 @@ DBDS    += runScript.dbd
 SOURCES_T2 += strdup.c
 SOURCES_vxWorks   += asprintf.c
 HEADERS += strdup.h asprintf.h
+HEADERS += require.h
 
 # We need to find the Linux link.h before the EPICS link.h
 USR_INCLUDES_Linux=-idirafter ${EPICS_BASE}/include