diff --git a/occ_build_occt_wasm.bat b/occ_build_occt_wasm.bat
index 455200c23c..91118f839d 100644
--- a/occ_build_occt_wasm.bat
+++ b/occ_build_occt_wasm.bat
@@ -11,7 +11,7 @@ set "aCasSrc=%~dp0"
 if exist env_custom.bat call env_custom.bat
 
 call "%EMSDK_ROOT%\emsdk_env.bat"
-set "aToolchain=%EMSDK%/fastcomp/emscripten/cmake/Modules/Platform/Emscripten.cmake"
+set "aToolchain=%EMSDK%/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
 
 set "anOcctVerSuffix="
 set "anOcctVersion=0.0.0"
diff --git a/occ_build_occt_wasm.sh b/occ_build_occt_wasm.sh
index ceabf9f060..9665368ab1 100755
--- a/occ_build_occt_wasm.sh
+++ b/occ_build_occt_wasm.sh
@@ -22,7 +22,7 @@ fi
 
 . ${EMSDK_ROOT}/emsdk_env.sh
 
-export aToolchain="${EMSDK}/fastcomp/emscripten/cmake/Modules/Platform/Emscripten.cmake"
+export aToolchain="${EMSDK}/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
 
 export aGitBranch=`git symbolic-ref --short HEAD`