diff --git a/mx.fastr/native-image.properties b/mx.fastr/native-image.properties
index f622cb9764a3d190cdb2627e1ed5067af2803dcd..48ad9b11c82930294f222d907b0acacefeb2043f 100644
--- a/mx.fastr/native-image.properties
+++ b/mx.fastr/native-image.properties
@@ -3,7 +3,7 @@
 
 ImageName = R
 
-Requires = Tool:truffle
+Requires = tool:truffle
 
 JavaArgs = \
     -Dfastr.resource.factory.class=com.oracle.truffle.r.nodes.builtin.EagerResourceHandlerFactory \