diff --git a/config_cmake.h.in b/config_cmake.h.in
index d234acba9348..47cfcc5e251d 100644
--- a/config_cmake.h.in
+++ b/config_cmake.h.in
@@ -115,6 +115,9 @@
 /* Define to 1 if you have the `wcsndup' function. */
 #cmakedefine HAVE_WCSNDUP 1
 
+/* Define to 1 if you have the `wcstod_l' function. */
+#cmakedefine HAVE_WCSTOD_L 1
+
 /* Define to 1 if the winsize struct and TIOCGWINSZ macro exist */
 #cmakedefine HAVE_WINSIZE 1