diff --git a/configure.in b/configure.in
index 48e60c0db4c7..579b8f0feed2 100644
--- a/configure.in
+++ b/configure.in
@@ -9137,7 +9137,7 @@ fi
 
 if test -n "$MOZ_USING_CCACHE"; then
     # Avoid double prepending ccache by omitting --with-ccache in building NSPR.
-    _SUBDIR_CONFIG_ARGS="`echo $_SUBDIR_CONFIG_ARGS | sed -e 's/--with-ccache\S* *//'`"
+    _SUBDIR_CONFIG_ARGS="`echo $_SUBDIR_CONFIG_ARGS | sed -e 's/--with-ccache[^ ]+//'`"
 fi
 
 MOZ_SUBCONFIGURE_NSPR()