diff --git a/mkspecs/features/qt_helper_lib.prf b/mkspecs/features/qt_helper_lib.prf
index bc20251bd97..964e256ee0e 100644
--- a/mkspecs/features/qt_helper_lib.prf
+++ b/mkspecs/features/qt_helper_lib.prf
@@ -89,4 +89,32 @@ TARGET = $$THE_TARGET
 
 # In static builds of Qt, convenience libraries must be installed,
 # as in this case they are not linked to the final library/plugin.
-installed|if(!not_installed:qtConfig(static)): load(qt_installs)
+installed|if(!not_installed:qtConfig(static)) {
+    !isEmpty(MODULE_EXT_HEADERS) {
+        headers.files = $${MODULE_EXT_HEADERS}
+        headers.path = $$[QT_INSTALL_HEADERS]/$$TARGET
+        INSTALLS += headers
+    } else {
+        !isEmpty(MODULE_EXT_HEADERS_DIR) {
+            headers.files = $$MODULE_EXT_HEADERS_DIR/*
+            headers.path = $$[QT_INSTALL_HEADERS]/$$TARGET
+            INSTALLS += headers
+        }
+    }
+
+    CONFIG += qt_install_module
+    rpl_header_base = $$MODULE_INCLUDEPATH
+    rpl_lib_base = $${MODULE_LIBS}
+    qqt_dir = \$\$\$\$[QT_INSTALL_HEADERS]
+    pri_header_replace.match = $$rpl_header_base
+    pri_header_replace.replace = $$qqt_dir/$$TARGET
+    pri_header_replace.CONFIG = path
+    pri_header_replace.filename = qt_ext_$${MODULE}.pri
+    qqt_dir = \$\$\$\$[QT_INSTALL_LIBS]
+    pri_lib_replace.match = $$rpl_lib_base
+    pri_lib_replace.replace = $$qqt_dir/$$prefix$${THE_TARGET}.$$suffix
+    pri_lib_replace.CONFIG = path
+    pri_lib_replace.filename = qt_ext_$${MODULE}.pri
+    QMAKE_INSTALL_REPLACE += pri_header_replace pri_lib_replace
+    load(qt_installs)
+}
diff --git a/src/3rdparty/freetype/freetype.pro b/src/3rdparty/freetype/freetype.pro
index 0665de521bf..7dce10a902a 100644
--- a/src/3rdparty/freetype/freetype.pro
+++ b/src/3rdparty/freetype/freetype.pro
@@ -7,6 +7,7 @@ CONFIG += \
     installed
 
 MODULE_INCLUDEPATH += $$PWD/include
+MODULE_EXT_HEADERS_DIR = $$PWD/include
 
 load(qt_helper_lib)
 
diff --git a/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro b/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro
index 752d349ebcf..8b53f3e990e 100644
--- a/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro
+++ b/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro
@@ -7,7 +7,6 @@ CONFIG += \
 
 MODULE_INCLUDEPATH += $$PWD/include/harfbuzz
 
-load(qt_helper_lib)
 
 # built-in shapers list configuration:
 SHAPERS += opentype       # HB's main shaper; enabling it should be enough most of the time
@@ -176,9 +175,13 @@ contains(SHAPERS, opentype) {
         $$PWD/src/hb-ot-var.h
 }
 
+MODULE_EXT_HEADERS = $$HEADERS
+
 contains(SHAPERS, fallback)|isEmpty(SHAPERS) {
     DEFINES += HAVE_FALLBACK
 
     SOURCES += \
         $$PWD/src/hb-fallback-shape.cc
 }
+
+load(qt_helper_lib)
diff --git a/src/3rdparty/libpng/libpng.pro b/src/3rdparty/libpng/libpng.pro
index a2f56669b47..b71dfefd200 100644
--- a/src/3rdparty/libpng/libpng.pro
+++ b/src/3rdparty/libpng/libpng.pro
@@ -7,6 +7,7 @@ CONFIG += \
     installed
 
 MODULE_INCLUDEPATH = $$PWD
+MODULE_EXT_HEADERS = png.h pngconf.h
 
 load(qt_helper_lib)