diff --git a/src/front/glsl/ast.rs b/src/front/glsl/ast.rs
index 4ebc2da023..7962f59b37 100644
--- a/src/front/glsl/ast.rs
+++ b/src/front/glsl/ast.rs
@@ -1,6 +1,6 @@
-use super::error::ErrorKind;
+use super::{constants::ConstantSolver, error::ErrorKind};
 use crate::{
-    proc::{ConstantSolver, ResolveContext, Typifier},
+    proc::{ResolveContext, Typifier},
     Arena, BinaryOperator, Binding, Constant, Expression, FastHashMap, Function, FunctionArgument,
     GlobalVariable, Handle, Interpolation, LocalVariable, Module, ShaderStage, Statement,
     StorageClass, Type,
diff --git a/src/proc/constants.rs b/src/front/glsl/constants.rs
similarity index 100%
rename from src/proc/constants.rs
rename to src/front/glsl/constants.rs
diff --git a/src/front/glsl/mod.rs b/src/front/glsl/mod.rs
index a05a62fd3f..7d3faf3e88 100644
--- a/src/front/glsl/mod.rs
+++ b/src/front/glsl/mod.rs
@@ -14,6 +14,7 @@ use ast::Program;
 use lex::Lexer;
 mod error;
 pub use error::ParseError;
+mod constants;
 mod functions;
 mod parser;
 #[cfg(test)]
diff --git a/src/proc/mod.rs b/src/proc/mod.rs
index 7aa2ca0568..5dec4285bf 100644
--- a/src/proc/mod.rs
+++ b/src/proc/mod.rs
@@ -2,7 +2,6 @@
 
 #[cfg(feature = "petgraph")]
 mod call_graph;
-mod constants;
 mod interface;
 mod layouter;
 mod namer;
@@ -12,7 +11,6 @@ mod validator;
 
 #[cfg(feature = "petgraph")]
 pub use call_graph::{CallGraph, CallGraphBuilder};
-pub use constants::{ConstantSolver, ConstantSolvingError};
 pub use interface::{Interface, Visitor};
 pub use layouter::{Alignment, Layouter};
 pub use namer::{EntryPointIndex, NameKey, Namer};