diff --git a/vm/Config.freebsd b/vm/Config.freebsd
index 4ff6241d7d..1a62e03d9a 100644
--- a/vm/Config.freebsd
+++ b/vm/Config.freebsd
@@ -1,4 +1,4 @@
 include vm/Config.unix
-PLAF_OBJS += vm/genunix.o
+PLAF_OBJS += vm/os-genunix.o
 CFLAGS += -export-dynamic -pthread
 LIBS = -ldl -lm $(X11_UI_LIBS)
diff --git a/vm/Config.linux b/vm/Config.linux
index ed2a04820f..7eecb598ab 100644
--- a/vm/Config.linux
+++ b/vm/Config.linux
@@ -1,4 +1,4 @@
 include vm/Config.unix
-PLAF_OBJS += vm/genunix.o
+PLAF_OBJS += vm/os-genunix.o
 CFLAGS += -export-dynamic
 LIBS = -ldl -lm $(X11_UI_LIBS)
diff --git a/vm/Config.solaris b/vm/Config.solaris
index f2d4afa462..c4c6684219 100644
--- a/vm/Config.solaris
+++ b/vm/Config.solaris
@@ -1,3 +1,5 @@
+include vm/Config.unix
+PLAF_OBJS += vm/os-genunix.o
 CFLAGS += -D_STDC_C99 -Drestrict=""
 LIBS += -ldl -lsocket -lnsl -lm -R/opt/PM/lib -R/opt/csw/lib \
 	-R/usr/local/lib -R/usr/sfw/lib -R/usr/X11R6/lib \