diff --git a/examples/compiled/all-chars.sh b/examples/compiled/all-chars.sh
index 0eb813ef..f559935a 100755
--- a/examples/compiled/all-chars.sh
+++ b/examples/compiled/all-chars.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((c = 0))
diff --git a/examples/compiled/base64.sh b/examples/compiled/base64.sh
index 52be9989..da4ee1cf 100755
--- a/examples/compiled/base64.sh
+++ b/examples/compiled/base64.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 __ALLOC=1 # Starting heap at 1 because 0 is the null pointer.
diff --git a/examples/compiled/cat.sh b/examples/compiled/cat.sh
index efcb587f..d7e44d6f 100755
--- a/examples/compiled/cat.sh
+++ b/examples/compiled/cat.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 __ALLOC=1 # Starting heap at 1 because 0 is the null pointer.
diff --git a/examples/compiled/cp.sh b/examples/compiled/cp.sh
index 7fdacdcf..fa256aae 100755
--- a/examples/compiled/cp.sh
+++ b/examples/compiled/cp.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((filename = 0))
diff --git a/examples/compiled/echo.sh b/examples/compiled/echo.sh
index a33f67fb..11d50406 100755
--- a/examples/compiled/echo.sh
+++ b/examples/compiled/echo.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((i = argv_ = argc = 0))
diff --git a/examples/compiled/empty.sh b/examples/compiled/empty.sh
index e5828186..af7584ef 100755
--- a/examples/compiled/empty.sh
+++ b/examples/compiled/empty.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 _main() {
diff --git a/examples/compiled/fib.sh b/examples/compiled/fib.sh
index e7134315..7e67745d 100755
--- a/examples/compiled/fib.sh
+++ b/examples/compiled/fib.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((__t2 = __t1 = n = 0))
diff --git a/examples/compiled/hello.sh b/examples/compiled/hello.sh
index 83e3da80..44fbf543 100755
--- a/examples/compiled/hello.sh
+++ b/examples/compiled/hello.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 _main() {
diff --git a/examples/compiled/print-reverse.sh b/examples/compiled/print-reverse.sh
index 44a86661..fa4536de 100755
--- a/examples/compiled/print-reverse.sh
+++ b/examples/compiled/print-reverse.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((i = len = tmp = end = str = 0))
diff --git a/examples/compiled/repl.sh b/examples/compiled/repl.sh
index ac2fcbfd..d43e0b1d 100755
--- a/examples/compiled/repl.sh
+++ b/examples/compiled/repl.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 __ALLOC=1 # Starting heap at 1 because 0 is the null pointer.
diff --git a/examples/compiled/reverse.sh b/examples/compiled/reverse.sh
index 422bdd3b..11754573 100755
--- a/examples/compiled/reverse.sh
+++ b/examples/compiled/reverse.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((i = argv_ = argc = 0))
diff --git a/examples/compiled/select-file.sh b/examples/compiled/select-file.sh
index 2eb606be..89d2d9ba 100755
--- a/examples/compiled/select-file.sh
+++ b/examples/compiled/select-file.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 ################################################################################
diff --git a/examples/compiled/sha256sum.sh b/examples/compiled/sha256sum.sh
index 7c33f76a..d4525219 100755
--- a/examples/compiled/sha256sum.sh
+++ b/examples/compiled/sha256sum.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 __ALLOC=1 # Starting heap at 1 because 0 is the null pointer.
diff --git a/examples/compiled/sum-array.sh b/examples/compiled/sum-array.sh
index 39723f57..a6a8ea6d 100755
--- a/examples/compiled/sum-array.sh
+++ b/examples/compiled/sum-array.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((sum = i = size = n = 0))
diff --git a/examples/compiled/wc-stdin.sh b/examples/compiled/wc-stdin.sh
index daea2254..523a3b5c 100755
--- a/examples/compiled/wc-stdin.sh
+++ b/examples/compiled/wc-stdin.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((c = 0))
diff --git a/examples/compiled/wc.sh b/examples/compiled/wc.sh
index 816a2813..b3175468 100755
--- a/examples/compiled/wc.sh
+++ b/examples/compiled/wc.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 __ALLOC=1 # Starting heap at 1 because 0 is the null pointer.
diff --git a/examples/compiled/welcome.sh b/examples/compiled/welcome.sh
index 9231653e..d726fa39 100755
--- a/examples/compiled/welcome.sh
+++ b/examples/compiled/welcome.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 : $((__t1 = i = name = 0))
diff --git a/examples/compiled/winterpi.sh b/examples/compiled/winterpi.sh
index 9f7fface..ab1b12d2 100755
--- a/examples/compiled/winterpi.sh
+++ b/examples/compiled/winterpi.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-set -e -u
+set -e -u -f
 LC_ALL=C
 
 __ALLOC=1 # Starting heap at 1 because 0 is the null pointer.
diff --git a/sh.c b/sh.c
index 025575f6..19ad7a43 100644
--- a/sh.c
+++ b/sh.c
@@ -2381,7 +2381,7 @@ void comp_glo_decl(ast node) {
 
 void prologue() {
   putstr("#!/bin/sh\n");
-  putstr("set -e -u\n");
+  putstr("set -e -u -f\n");
   putstr("LC_ALL=C\n\n");
 }