diff --git a/.gitignore b/.gitignore
index 3055c6f6..76fafc47 100644
--- a/.gitignore
+++ b/.gitignore
@@ -127,7 +127,7 @@ libfswatch_config.h.in
 scripts/fswatch-run-bash
 scripts/fswatch-run-zsh
 docker/alpine/Dockerfile
-docker/debian-9/Dockerfile
+docker/debian9/Dockerfile
 
 # Output files
 man/fswatch.7
diff --git a/configure.ac b/configure.ac
index 05f89fa3..d49bf441 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,7 +33,7 @@ AC_CONFIG_FILES([libfswatch/src/Makefile libfswatch/src/libfswatch/Makefile libf
 AC_CONFIG_FILES([fswatch/Makefile fswatch/src/Makefile fswatch/doc/Makefile fswatch/po/Makefile.in])
 AC_CONFIG_FILES([man/fswatch.7])
 AC_CONFIG_FILES([docker/alpine/Dockerfile])
-AC_CONFIG_FILES([docker/debian-9/Dockerfile])
+AC_CONFIG_FILES([docker/debian9/Dockerfile])
 AC_CONFIG_MACRO_DIRS([m4])
 AC_CONFIG_MACRO_DIR([m4])
 
diff --git a/docker/debian-9/Dockerfile.in b/docker/debian9/Dockerfile.in
similarity index 100%
rename from docker/debian-9/Dockerfile.in
rename to docker/debian9/Dockerfile.in