diff --git a/sc2/build.vars.in b/sc2/build.vars.in
index ca6bb9ef2..5dc16558c 100644
--- a/sc2/build.vars.in
+++ b/sc2/build.vars.in
@@ -28,10 +28,11 @@ uqm_INSTALL_SHAREDIR='@INSTALL_SHAREDIR@'
 # Exported variables are available from all the Makeinfo files
 # Non-exported files only where build.vars is explicitely included.
 uqm_SOUNDMODULE='@SOUNDMODULE@'
+uqm_HAVE_REGEX='@HAVE_REGEX_H_FLAG@'
 uqm_HAVE_OPENGL='@HAVE_OPENGL@'
 uqm_USE_ZIP_IO='@USE_ZIP_IO@'
 WINDRES='@WINDRES@'
 REZ='@REZ@'
 DEBUG='@DEBUG@'
-export uqm_SOUNDMODULE uqm_HAVE_OPENGL uqm_USE_ZIP_IO WINDRES DEBUG
+export uqm_SOUNDMODULE uqm_HAVE_REGEX uqm_HAVE_OPENGL uqm_USE_ZIP_IO WINDRES DEBUG