diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt
index f47b178..55b56df 100644
--- a/engine/CMakeLists.txt
+++ b/engine/CMakeLists.txt
@@ -63,6 +63,15 @@ if(PDFENGINE_WITH_PDFIUM)
     target_compile_definitions(pdfengine PRIVATE PDFENGINE_WITH_PDFIUM)
 endif()
 
+# Directory of the bundled fallback fonts (Carlito/Tinos). Under WASM they're embedded into the
+# module's in-memory FS at /fonts (see wasm/CMakeLists.txt --embed-file); natively the engine reads
+# them straight from the source assets dir. font_fallback.cpp prefers these over OS fonts.
+if(EMSCRIPTEN)
+    target_compile_definitions(pdfengine PRIVATE PDFENGINE_FONT_DIR="/fonts")
+else()
+    target_compile_definitions(pdfengine PRIVATE PDFENGINE_FONT_DIR="${CMAKE_SOURCE_DIR}/engine/assets/fonts")
+endif()
+
 if(PDFENGINE_WITH_SKIA)
     target_link_libraries(pdfengine PRIVATE skia::skia)
     target_compile_definitions(pdfengine PUBLIC PDFENGINE_WITH_SKIA)
diff --git a/engine/assets/fonts/Carlito-Bold.ttf b/engine/assets/fonts/Carlito-Bold.ttf
new file mode 100644
index 0000000..67543b5
Binary files /dev/null and b/engine/assets/fonts/Carlito-Bold.ttf differ
diff --git a/engine/assets/fonts/Carlito-BoldItalic.ttf b/engine/assets/fonts/Carlito-BoldItalic.ttf
new file mode 100644
index 0000000..e2c5d88
Binary files /dev/null and b/engine/assets/fonts/Carlito-BoldItalic.ttf differ
diff --git a/engine/assets/fonts/Carlito-Italic.ttf b/engine/assets/fonts/Carlito-Italic.ttf
new file mode 100644
index 0000000..8dc3c84
Binary files /dev/null and b/engine/assets/fonts/Carlito-Italic.ttf differ
diff --git a/engine/assets/fonts/Carlito-Regular.ttf b/engine/assets/fonts/Carlito-Regular.ttf
new file mode 100644
index 0000000..427b959
Binary files /dev/null and b/engine/assets/fonts/Carlito-Regular.ttf differ
diff --git a/engine/assets/fonts/Tinos-Bold.ttf b/engine/assets/fonts/Tinos-Bold.ttf
new file mode 100644
index 0000000..887fc97
Binary files /dev/null and b/engine/assets/fonts/Tinos-Bold.ttf differ
diff --git a/engine/assets/fonts/Tinos-BoldItalic.ttf b/engine/assets/fonts/Tinos-BoldItalic.ttf
new file mode 100644
index 0000000..a9abd08
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diff --git a/engine/assets/fonts/Tinos-Italic.ttf b/engine/assets/fonts/Tinos-Italic.ttf
new file mode 100644
index 0000000..5aed4f3
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