diff --git a/CMakeLists.txt b/CMakeLists.txt
index 982cb10e..d426ffcf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -449,6 +449,7 @@ if (DISABLED_LEGACY_ENGINE)
         src/classify/shapetable.cpp
         src/classify/tessclassifier.cpp
         src/classify/trainingsample.cpp
+        src/dict/permdawg.cpp
         src/dict/hyphen.cpp
         src/wordrec/associate.cpp
         src/wordrec/chop.cpp
diff --git a/Makefile.am b/Makefile.am
index aa935fd1..54674f14 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -488,11 +488,11 @@ libtesseract_la_SOURCES += src/dict/context.cpp
 libtesseract_la_SOURCES += src/dict/dawg.cpp
 libtesseract_la_SOURCES += src/dict/dawg_cache.cpp
 libtesseract_la_SOURCES += src/dict/dict.cpp
-libtesseract_la_SOURCES += src/dict/permdawg.cpp
 libtesseract_la_SOURCES += src/dict/stopper.cpp
 libtesseract_la_SOURCES += src/dict/trie.cpp
 if !DISABLED_LEGACY_ENGINE
 libtesseract_la_SOURCES += src/dict/hyphen.cpp
+libtesseract_la_SOURCES += src/dict/permdawg.cpp
 endif
 
 # Rules for src/lstm.