diff --git a/pbjson-build/src/descriptor.rs b/pbjson-build/src/descriptor.rs
index 6e557f0..7bd5168 100644
--- a/pbjson-build/src/descriptor.rs
+++ b/pbjson-build/src/descriptor.rs
@@ -21,9 +21,9 @@ pub struct Package {
 
 impl Display for Package {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.path[0].to_snake_case())?;
+        write!(f, "{}", self.path[0].to_snake_case_ident())?;
         for element in &self.path[1..self.path.len()] {
-            write!(f, ".{}", element.to_snake_case())?;
+            write!(f, ".{}", element.to_snake_case_ident())?;
         }
         Ok(())
     }
@@ -68,7 +68,7 @@ impl TypeName {
         Self(s)
     }
 
-    pub fn to_snake_case(&self) -> String {
+    pub fn to_snake_case_ident(&self) -> String {
         use heck::ToSnakeCase;
         escape_ident(self.0.to_snake_case())
     }
diff --git a/pbjson-build/src/resolver.rs b/pbjson-build/src/resolver.rs
index 5d1d68f..8d9d4bb 100644
--- a/pbjson-build/src/resolver.rs
+++ b/pbjson-build/src/resolver.rs
@@ -75,7 +75,7 @@ impl<'a> Resolver<'a> {
         while let Some(i) = iter.next() {
             match iter.peek() {
                 Some(_) => {
-                    ret.push_str(i.to_snake_case().as_str());
+                    ret.push_str(i.to_snake_case_ident().as_str());
                     ret.push_str("::");
                 }
                 None => {