diff --git a/tecs/makefile b/tecs/makefile
index 2e2cac0e..ef1c69c8 100644
--- a/tecs/makefile
+++ b/tecs/makefile
@@ -7,7 +7,7 @@
 #------------ for DigitalUnix (add -DFORTIFY to CC_... for fortified version)
 CC_alpha_osf1=cc -std1 -g -warnprotos -I../ -I. -I../hardsup
 FOR_alpha_osf1=f77 -u -g
-TECS_PLOT_alpha_osf1=f90 -c -u -g tecs_plot.f90
+TECS_PLOT_alpha_osf1=f90 -c -u -g -free tecs_plot.f
 TECLI_LIB_alpha_osf1=-L/data/lnslib/lib -lpgplot -lX11 -lXm -so_archive
 SYS_FILE_alpha_osf1=sys_aunix
 #CFLAGS_alpha_osf1= -std1 -g -warnprotos -I../ -I. -I../hardsup -DFORTIFY 
@@ -46,7 +46,7 @@ libtecsl.a: $(CLI_OBJ)
 
 all: libtecsl.a bin/TecsServer bin/TecsClient bin/keep_running
 
-tecs_plot.o: tecs_plot.f90 tecs_plot.f
+tecs_plot.o: tecs_plot.f
 	$(TECS_PLOT)
 
 bin/TecsServer: $(SERV_OBJ)