diff --git a/parser/build.rs b/parser/build.rs
index 6b781e1638..062fa2fdae 100644
--- a/parser/build.rs
+++ b/parser/build.rs
@@ -7,5 +7,5 @@ fn main() {
         .use_cargo_dir_conventions()
         .process_file("src/grammar.lalrpop")
         .unwrap();
-    println!("cargo:rerun-if-changed=grammar.lalrpop");
+    println!("cargo:rerun-if-changed=src/grammar.lalrpop");
 }
diff --git a/vm/build.rs b/vm/build.rs
index c00980ff27..21271b401c 100644
--- a/vm/build.rs
+++ b/vm/build.rs
@@ -8,7 +8,7 @@ mod build {
             .process_file("src/core/grammar.lalrpop")
             .unwrap();
 
-        println!("cargo:rerun-if-changed=core/grammar.lalrpop");
+        println!("cargo:rerun-if-changed=src/core/grammar.lalrpop");
     }
 }