diff --git a/Makefile b/Makefile
index d9ec1ba..028f689 100644
--- a/Makefile
+++ b/Makefile
@@ -38,23 +38,26 @@ SRC = $(wildcard *.c)
 OBJ = $(SRC:.c=.o)
 
 ICON_SRC = assets/app-icon.png
-ICON_DST = assets/icons/hicolor/512x512/apps/maturita.png
+# Always use the real 512×512 asset — copying app-icon.png (1024×1024) breaks
+# linuxdeploy, which rejects non-standard icon resolutions.
+ICON_DST = share/icons/hicolor/512x512/apps/maturita.png
+ICON_RUNTIME = assets/icons/hicolor/512x512/apps/maturita.png
 ICON_ICO = assets/app-icon.ico
 
 all: $(TARGET)
 
-$(ICON_DST): $(ICON_SRC)
+$(ICON_RUNTIME): $(ICON_DST)
 	mkdir -p $(dir $@)
-	cp "$(ICON_SRC)" "$@"
+	cp "$(ICON_DST)" "$@"
 
 ifeq ($(OS),Windows_NT)
 $(RC_OBJ): maturita.rc $(ICON_ICO)
 	$(WINDRES) maturita.rc -o $(RC_OBJ)
 
-$(TARGET): $(SRC) $(ICON_DST) $(RC_OBJ)
+$(TARGET): $(SRC) $(ICON_RUNTIME) $(RC_OBJ)
 	$(CC) $(CFLAGS) -o $(TARGET) $(SRC) $(RC_OBJ) $(LIBS)
 else
-$(TARGET): $(SRC) $(ICON_DST)
+$(TARGET): $(SRC) $(ICON_RUNTIME)
 	$(CC) $(CFLAGS) -o $(TARGET) $(SRC) $(LIBS)
 endif
 
diff --git a/scripts/bundle-linux.sh b/scripts/bundle-linux.sh
index 4f2a15e..b8fc37c 100755
--- a/scripts/bundle-linux.sh
+++ b/scripts/bundle-linux.sh
@@ -19,7 +19,8 @@ esac
 OUT_NAME="maturita-linux-${ARCH}.AppImage"
 APPDIR="$ROOT/dist/AppDir"
 TOOLS="$ROOT/dist/tools"
-ICON_DST="assets/icons/hicolor/512x512/apps/maturita.png"
+# Real 512×512 PNG (assets/app-icon.png is 1024×1024 and linuxdeploy rejects it).
+ICON_512="$ROOT/share/icons/hicolor/512x512/apps/maturita.png"
 
 echo "==> Building maturita"
 make -C "$ROOT" clean
@@ -35,9 +36,9 @@ mkdir -p "$APPDIR/usr/bin" \
 
 cp -f "$ROOT/maturita" "$APPDIR/usr/bin/maturita"
 cp -f "$ROOT/style.css" "$APPDIR/style.css"
-cp -f "$ROOT/$ICON_DST" "$APPDIR/icons/hicolor/512x512/apps/maturita.png"
-cp -f "$ROOT/$ICON_DST" "$APPDIR/usr/share/icons/hicolor/512x512/apps/maturita.png"
-cp -f "$ROOT/$ICON_DST" "$APPDIR/maturita.png"
+cp -f "$ICON_512" "$APPDIR/icons/hicolor/512x512/apps/maturita.png"
+cp -f "$ICON_512" "$APPDIR/usr/share/icons/hicolor/512x512/apps/maturita.png"
+cp -f "$ICON_512" "$APPDIR/maturita.png"
 cp -R "$ROOT/share/." "$APPDIR/share/"
 cp -R "$ROOT/share/." "$APPDIR/usr/share/"
 cp -f "$ROOT/share/applications/org.maturita.Maturita.desktop" \