diff --git a/src/cap5/Makefile b/src/cap5/Makefile
index 4707c1621..98e74a2cc 100644
--- a/src/cap5/Makefile
+++ b/src/cap5/Makefile
@@ -26,7 +26,7 @@ PERL_VERSION = $(shell $(PERL) ../perlConfig.pl version)
 PERL_ARCHNAME = $(shell $(PERL) ../perlConfig.pl archname)
 PERL_ARCHPATH = $(PERL_VERSION)/$(PERL_ARCHNAME)
 
-ifeq ($(findstring Host,$(VALID_BUILDS)),Host)
+ifeq ($(T_A),$(EPICS_HOST_ARCH))
 ifeq ($(findstring $(OS_CLASS),WIN32 cygwin32),)
   # Doesn't build on WIN32
   LOADABLE_LIBRARY_HOST = Cap5