diff --git a/src/libespeak-ng/compiledict.c b/src/libespeak-ng/compiledict.c
index b7055fa8..c56fd531 100644
--- a/src/libespeak-ng/compiledict.c
+++ b/src/libespeak-ng/compiledict.c
@@ -26,7 +26,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/dictionary.c b/src/libespeak-ng/dictionary.c
index b26068c7..8b1eb948 100644
--- a/src/libespeak-ng/dictionary.c
+++ b/src/libespeak-ng/dictionary.c
@@ -25,7 +25,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <wchar.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/fifo.c b/src/libespeak-ng/fifo.c
index 43f0d453..ddb3c65e 100644
--- a/src/libespeak-ng/fifo.c
+++ b/src/libespeak-ng/fifo.c
@@ -29,7 +29,6 @@
 #include <sys/time.h>
 #include <time.h>
 #include <unistd.h>
-#include <wchar.h>
 
 #include <espeak-ng/espeak_ng.h>
 
diff --git a/src/libespeak-ng/intonation.c b/src/libespeak-ng/intonation.c
index 08048ee4..ce6f35d3 100644
--- a/src/libespeak-ng/intonation.c
+++ b/src/libespeak-ng/intonation.c
@@ -23,7 +23,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/numbers.c b/src/libespeak-ng/numbers.c
index cd25d410..f72796c8 100644
--- a/src/libespeak-ng/numbers.c
+++ b/src/libespeak-ng/numbers.c
@@ -25,7 +25,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wchar.h>
 #include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
diff --git a/src/libespeak-ng/setlengths.c b/src/libespeak-ng/setlengths.c
index 9aa6c4ae..acf8d932 100644
--- a/src/libespeak-ng/setlengths.c
+++ b/src/libespeak-ng/setlengths.c
@@ -23,7 +23,6 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/synth_mbrola.c b/src/libespeak-ng/synth_mbrola.c
index 2e18646f..f89715a5 100644
--- a/src/libespeak-ng/synth_mbrola.c
+++ b/src/libespeak-ng/synth_mbrola.c
@@ -26,7 +26,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/synthdata.c b/src/libespeak-ng/synthdata.c
index ea02c179..73c9a0d2 100644
--- a/src/libespeak-ng/synthdata.c
+++ b/src/libespeak-ng/synthdata.c
@@ -26,7 +26,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/synthesize.c b/src/libespeak-ng/synthesize.c
index e7719c7c..2c812a5c 100644
--- a/src/libespeak-ng/synthesize.c
+++ b/src/libespeak-ng/synthesize.c
@@ -26,7 +26,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/tr_languages.c b/src/libespeak-ng/tr_languages.c
index eed1df5d..c44a216d 100644
--- a/src/libespeak-ng/tr_languages.c
+++ b/src/libespeak-ng/tr_languages.c
@@ -25,7 +25,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <wctype.h>
 
 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
diff --git a/src/libespeak-ng/voices.c b/src/libespeak-ng/voices.c
index f35bcf2a..5d7a4427 100644
--- a/src/libespeak-ng/voices.c
+++ b/src/libespeak-ng/voices.c
@@ -26,7 +26,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <strings.h>
-#include <wctype.h>
 
 #if defined(_WIN32) || defined(_WIN64)
 #include <windows.h>