diff --git a/Camomile/mappings/dune b/Camomile/mappings/dune
index 78c6f41..8de9aa5 100644
--- a/Camomile/mappings/dune
+++ b/Camomile/mappings/dune
@@ -2,7 +2,7 @@
 
 (executable
  (name gen_mappings)
- (libraries toolslib camomile.library))
+ (libraries toolslib camomile.library str))
 
 (install
  (section share)
diff --git a/Camomile/tools/dune b/Camomile/tools/dune
index 4e06e8f..f02f11a 100644
--- a/Camomile/tools/dune
+++ b/Camomile/tools/dune
@@ -12,7 +12,7 @@
         camomilestringprep)
  (flags -I Camomile :standard)
  (modules :standard \ camomilelocaledef camomilelocaledef_lexer iana)
- (libraries toolslib camomile camomile.library))
+ (libraries toolslib camomile camomile.library str))
 
 (executable
  (name iana)
@@ -21,6 +21,6 @@
 
 (executable
  (name camomilelocaledef)
- (libraries toolslib camomile.library)
+ (libraries toolslib camomile.library str)
  (flags -I Camomile :standard)
  (modules camomilelocaledef camomilelocaledef_lexer))