diff --git a/Makefile.am b/Makefile.am
index 25c18bd3..990413f0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -237,8 +237,10 @@ builtin_sources += drivers/atmodem/atutil.h \
 			drivers/stemodem/caif_socket.h \
 			drivers/stemodem/if_caif.h
 
+if PHONESIM
 builtin_modules += phonesim
 builtin_sources += plugins/phonesim.c
+endif
 
 builtin_modules += atgen
 builtin_sources += plugins/atgen.c