diff --git a/configure b/configure
index 67f5b869c..cb77572ce 100755
--- a/configure
+++ b/configure
@@ -4252,7 +4252,7 @@ fi
 
 
 needs_cpp_precomp=no
-LUAFLAGS="MYCFLAGS=\"-DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
+LUAFLAGS="MYCFLAGS=\"$CFLAGS -DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
 
 case "$host" in
   *alpha-dec-osf*)
@@ -4481,11 +4481,11 @@ _ACEOF
 
 fi
 
-    LUAFLAGS="MYCFLAGS=\"-DLUA_USE_MACOSX\""
+    LUAFLAGS="MYCFLAGS=\"$CFLAGS -DLUA_USE_MACOSX\""
     needs_cpp_precomp=yes
     ;;
   *)
-   LUAFLAGS="MYCFLAGS=\"-DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
+   LUAFLAGS="MYCFLAGS=\"$CFLAGS -DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
 esac
 
 
diff --git a/configure.ac b/configure.ac
index 54807e9b8..367e0b8b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,7 +107,7 @@ AC_SUBST(COMPAT_SRCS)
 AC_PATH_TOOL([STRIP], [strip], [/bin/true])
 
 needs_cpp_precomp=no
-LUAFLAGS="MYCFLAGS=\"-DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
+LUAFLAGS="MYCFLAGS=\"$CFLAGS -DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
 
 case "$host" in
   *alpha-dec-osf*)
@@ -158,11 +158,11 @@ case "$host" in
     AC_DEFINE(MACOSX)
     dnl on Mac OSX the math library seems to contain unwanted getopt cruft
     AC_CHECK_LIB(m, main)
-    LUAFLAGS="MYCFLAGS=\"-DLUA_USE_MACOSX\""
+    LUAFLAGS="MYCFLAGS=\"$CFLAGS -DLUA_USE_MACOSX\""
     needs_cpp_precomp=yes
     ;;
   *)
-   LUAFLAGS="MYCFLAGS=\"-DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
+   LUAFLAGS="MYCFLAGS=\"$CFLAGS -DLUA_USE_POSIX -DLUA_USE_DLOPEN\""
 esac
 
 AC_SUBST(LUAFLAGS)