diff --git a/extensions/bintools/AMBuilder b/extensions/bintools/AMBuilder
index d2617618..bd778dfc 100644
--- a/extensions/bintools/AMBuilder
+++ b/extensions/bintools/AMBuilder
@@ -8,6 +8,10 @@ binary.compiler.cxxincludes += [
   os.path.join(builder.sourcePath, 'public', 'jit'),
   os.path.join(builder.sourcePath, 'public', 'jit', 'x86'),
 ]
+if binary.compiler.vendor == 'gcc' or binary.compiler.vendor == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.vendor == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 
 binary.sources += [
   'extension.cpp',
diff --git a/extensions/clientprefs/AMBuilder b/extensions/clientprefs/AMBuilder
index d7eac743..b30a9f06 100644
--- a/extensions/clientprefs/AMBuilder
+++ b/extensions/clientprefs/AMBuilder
@@ -5,6 +5,10 @@ binary = SM.ExtLibrary(builder, 'clientprefs.ext')
 binary.compiler.cxxincludes += [
   os.path.join(SM.mms_root, 'core', 'sourcehook'),
 ]
+if binary.compiler.vendor == 'gcc' or binary.compiler.vendor == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.vendor == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 
 binary.sources += [
   'extension.cpp',
diff --git a/extensions/curl/AMBuilder b/extensions/curl/AMBuilder
index f877b833..b5e6377b 100644
--- a/extensions/curl/AMBuilder
+++ b/extensions/curl/AMBuilder
@@ -8,6 +8,10 @@ binary.compiler.includes += [
   os.path.join(builder.sourcePath, 'extensions', 'curl', 'curl-src', 'include')
 ]
 binary.compiler.defines += ['CURL_STATICLIB']
+if binary.compiler.vendor == 'gcc' or binary.compiler.vendor == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.vendor == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 binary.compiler.postlink += [libcurl.binary]
 if builder.target_platform == 'linux':
   binary.compiler.postlink += ['-lrt']
diff --git a/extensions/sqlite/AMBuilder b/extensions/sqlite/AMBuilder
index 84584b08..ebed9834 100644
--- a/extensions/sqlite/AMBuilder
+++ b/extensions/sqlite/AMBuilder
@@ -5,6 +5,10 @@ binary = SM.ExtLibrary(builder, 'dbi.sqlite.ext')
 binary.compiler.cxxincludes += [
   os.path.join(SM.mms_root, 'core', 'sourcehook'),
 ]
+if binary.compiler.vendor == 'gcc' or binary.compiler.vendor == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.vendor == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 
 binary.compiler.defines += [
   'SQLITE_OMIT_LOAD_EXTENSION',
diff --git a/extensions/topmenus/AMBuilder b/extensions/topmenus/AMBuilder
index 5760bbc5..249894ee 100644
--- a/extensions/topmenus/AMBuilder
+++ b/extensions/topmenus/AMBuilder
@@ -5,6 +5,10 @@ binary = SM.ExtLibrary(builder, 'topmenus.ext')
 binary.compiler.cxxincludes += [
   os.path.join(SM.mms_root, 'core', 'sourcehook'),
 ]
+if binary.compiler.vendor == 'gcc' or binary.compiler.vendor == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.vendor == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 
 binary.sources += [
   'extension.cpp',
diff --git a/extensions/updater/AMBuilder b/extensions/updater/AMBuilder
index 6b26b9fc..ed7659c1 100644
--- a/extensions/updater/AMBuilder
+++ b/extensions/updater/AMBuilder
@@ -5,6 +5,10 @@ binary = SM.ExtLibrary(builder, 'updater.ext')
 binary.compiler.cxxincludes += [
   os.path.join(SM.mms_root, 'core', 'sourcehook'),
 ]
+if binary.compiler.vendor == 'gcc' or binary.compiler.vendor == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.vendor == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 
 binary.sources += [
   'extension.cpp',