diff --git a/1986/bright/Makefile b/1986/bright/Makefile
index 736df938b..aa49d70fa 100644
--- a/1986/bright/Makefile
+++ b/1986/bright/Makefile
@@ -195,7 +195,7 @@ alt: ${DATA} ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files
diff --git a/1986/stein/Makefile b/1986/stein/Makefile
index 32305fa26..7f16b6751 100644
--- a/1986/stein/Makefile
+++ b/1986/stein/Makefile
@@ -189,7 +189,7 @@ ${PROG}: ${PROG}.c
 
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	-${RM} -f a.out
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 	-${LN} $@ a.out
diff --git a/1987/hines/Makefile b/1987/hines/Makefile
index d2129db3d..ba378dcdb 100644
--- a/1987/hines/Makefile
+++ b/1987/hines/Makefile
@@ -190,7 +190,7 @@ alt: ${DATA} ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files
diff --git a/1987/lievaart/Makefile b/1987/lievaart/Makefile
index 9969402aa..368606529 100644
--- a/1987/lievaart/Makefile
+++ b/1987/lievaart/Makefile
@@ -195,11 +195,11 @@ alt: ${DATA} ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 ${PROG}2.orig: ${PROG}2.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files
diff --git a/1988/dale/Makefile b/1988/dale/Makefile
index 2633b2141..7883878c9 100644
--- a/1988/dale/Makefile
+++ b/1988/dale/Makefile
@@ -191,7 +191,7 @@ alt: data ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files
diff --git a/1988/isaak/Makefile b/1988/isaak/Makefile
index f48a16866..51d65f9d1 100644
--- a/1988/isaak/Makefile
+++ b/1988/isaak/Makefile
@@ -194,7 +194,7 @@ alt: data ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files
diff --git a/1988/westley/Makefile b/1988/westley/Makefile
index 6cbb24a8f..6aa67ca7b 100644
--- a/1988/westley/Makefile
+++ b/1988/westley/Makefile
@@ -191,7 +191,7 @@ alt: data ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files
diff --git a/1989/jar.1/Makefile b/1989/jar.1/Makefile
index 6e64fad51..1dcba3a1b 100644
--- a/1989/jar.1/Makefile
+++ b/1989/jar.1/Makefile
@@ -192,7 +192,7 @@ alt: data ${ALT_TARGET}
 	@${TRUE}
 
 ${PROG}.orig: ${PROG.orig}.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${RM} -f $@
 	${CP} jar.1.orig.sh $@
 	${CHMOD} +x $@
diff --git a/1989/jar.2/Makefile b/1989/jar.2/Makefile
index dff8650a8..5d8edda74 100644
--- a/1989/jar.2/Makefile
+++ b/1989/jar.2/Makefile
@@ -190,7 +190,7 @@ alt: data ${ALT_TARGET}
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 ${PROG}.orig: ${PROG}.orig.c
-	@echo "NOTE: The original source may not compile using modern compilers."
+	@echo "NOTE: The original source might not compile using modern compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # data files