diff --git a/.github/workflows/emscripten.yml b/.github/workflows/emscripten.yml
index 0fe3849..519eed7 100644
--- a/.github/workflows/emscripten.yml
+++ b/.github/workflows/emscripten.yml
@@ -2,7 +2,7 @@ name: Emscripten Build
 on: [push, pull_request]
 
 env:
-  EM_VERSION: 3.1.18
+  EM_VERSION: 3.1.32
   EM_CACHE_FOLDER: 'emsdk-cache'
 
 jobs:
@@ -22,7 +22,7 @@ jobs:
         key: ${{env.EM_VERSION}}-${{ runner.os }}
 
     - name: Setup Emscripten toolchain
-      uses: mymindstorm/setup-emsdk@v11
+      uses: mymindstorm/setup-emsdk@v12
       with:
         version: ${{ env.EM_VERSION }}
         actions-cache-folder: ${{env.EM_CACHE_FOLDER}}
diff --git a/src/texthook.cpp b/src/texthook.cpp
index e446f0f..5c3603f 100644
--- a/src/texthook.cpp
+++ b/src/texthook.cpp
@@ -9,17 +9,17 @@ void texthook_character(int page, int character) {
 			character, page);
 }
 
-EM_JS(void, texthook_newline, (void), {
-	xsystem35.texthook.newline();
-});
+void texthook_newline() {
+	EM_ASM(xsystem35.texthook.newline());
+}
 
-EM_JS(void, texthook_nextpage, (void), {
-	xsystem35.texthook.nextpage();
-});
+void texthook_nextpage() {
+	EM_ASM(xsystem35.texthook.nextpage());
+}
 
-EM_JS(void, texthook_keywait, (void), {
-	xsystem35.texthook.keywait();
-});
+void texthook_keywait(void) {
+	EM_ASM(xsystem35.texthook.keywait());
+}
 
 #elif defined(TEXTHOOK_PRINT)  // --------------------------------------
 
diff --git a/src/texthook.h b/src/texthook.h
index aba722f..4df418d 100644
--- a/src/texthook.h
+++ b/src/texthook.h
@@ -1,13 +1,9 @@
 #ifndef _TEXTHOOK_H_
 #define _TEXTHOOK_H_
 
-extern "C" {
-
 void texthook_character(int page, int character);
-void texthook_newline(void);
-void texthook_nextpage(void);
-void texthook_keywait(void);
-
-}
+void texthook_newline();
+void texthook_nextpage();
+void texthook_keywait();
 
 #endif /* _TEXTHOOK_H_ */