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-rw-r--r--Build/source/texk/detex/configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/Build/source/texk/detex/configure.ac b/Build/source/texk/detex/configure.ac
index 2413e4c1c09..be222471249 100644
--- a/Build/source/texk/detex/configure.ac
+++ b/Build/source/texk/detex/configure.ac
@@ -15,7 +15,7 @@ AC_CONFIG_MACRO_DIR([../../m4])
dnl Common code for all programs using libkpathsea.
KPSE_COMMON([detex])
-KPSE_PROG_LEX
+AC_PROG_LEX
AC_HEADER_TIME
AC_CONFIG_HEADERS([c-auto.h:c-auto.in])