diff --git a/configure b/configure
index 0dbbbb7..5a25878 100755
--- a/configure
+++ b/configure
@@ -86,8 +86,8 @@ PREFIX=$PREFIX
 XDG_CONFIG_DIR=$XDG_CONFIG_DIR
 MANPREFIX=$MANPREFIX
 
-CFLAGS=$CFLAGS
-LDFLAGS=$LDFLAGS
+CFLAGS+=$CFLAGS
+LDFLAGS+=$LDFLAGS
 
 EOF