diff --git a/.gitignore b/.gitignore
index 749260b..afe1ab1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 /Packages
 /*.xcodeproj
 xcuserdata
+.swiftpm/
diff --git a/Sources/Onigmo/include/st.h b/Sources/Onigmo/include/st.h
index 812292b..2dbfa60 100644
--- a/Sources/Onigmo/include/st.h
+++ b/Sources/Onigmo/include/st.h
@@ -62,7 +62,11 @@ typedef st_data_t st_index_t;
 typedef int st_compare_func(st_data_t, st_data_t);
 typedef st_index_t st_hash_func(st_data_t);
 
-typedef char st_check_for_sizeof_st_index_t[SIZEOF_VOIDP == (int)sizeof(st_index_t) ? 1 : -1];
+#ifndef __EMSCRIPTEN__
+/* See issue: https://github.com/k-takata/Onigmo/issues/130 */
+typedef char st_check_for_sizeof_st_index_t[SIZEOF_VOIDP == (int)sizeof(st_index_t) ? 1 : 0];
+#endif
+
 #define SIZEOF_ST_INDEX_T SIZEOF_VOIDP
 
 struct st_hash_type {
diff --git a/Sources/Onigmo/src/enc/mktable.c b/Sources/Onigmo/src/enc/mktable.c
index 4edd5a0..19beb62 100644
--- a/Sources/Onigmo/src/enc/mktable.c
+++ b/Sources/Onigmo/src/enc/mktable.c
@@ -1159,26 +1159,3 @@ static int exec(FILE* fp, ENC_INFO* einfo)
 
   return 0;
 }
-
-extern int main(int argc ARG_UNUSED, char* argv[] ARG_UNUSED)
-{
-  int r;
-  int i;
-  FILE* fp = stdout;
-
-  setlocale(LC_ALL, "C");
-  /* setlocale(LC_ALL, "POSIX"); */
-  /* setlocale(LC_ALL, "en_GB.iso88591"); */
-  /* setlocale(LC_ALL, "de_BE.iso88591"); */
-  /* setlocale(LC_ALL, "fr_FR.iso88591"); */
-
-  for (i = 0; i < (int )(sizeof(Info)/sizeof(ENC_INFO)); i++) {
-    r = exec(fp, &Info[i]);
-    if (r < 0) {
-      fprintf(stderr, "FAIL exec(): %d\n", r);
-      return -1;
-    }
-  }
-
-  return 0;
-}