diff --git a/freecad.spec b/freecad.spec
index 4f579de..90a18ef 100644
--- a/freecad.spec
+++ b/freecad.spec
@@ -135,6 +135,7 @@ find ./src -name "*.cpp*" |xargs chmod 644
 . bin/activate
 
 export QTDIR=/opt/qt5/5.15
+export Qt5_DIR=/opt/qt5/5.15
 
 
 %cmake \
@@ -148,6 +149,7 @@ export QTDIR=/opt/qt5/5.15
 	-DCMAKE_CXX_COMPILER=/opt/llvm17/bin/clang++ \
     -DCMAKE_C_COMPILER=/opt/llvm17/bin/clang \
     -DQTDIR=/opt/qt5/5.15 \
+    -Dexport Qt5_DIR=/opt/qt5/5.15 \
     -DBUILD_QT5=ON
 
 %make