diff --git a/app/app.pro b/app/app.pro
index 78f9f6d..2b357ef 100644
--- a/app/app.pro
+++ b/app/app.pro
@@ -420,7 +420,7 @@ RESOURCES += \
 
 contains(EPT_CONFIG, install) {
     # add the install dir for the core the the rpath
-    unix:QMAKE_RPATHDIR += $$EPT_INSTALL_LIB_RDIR/entropypianotuner
+    unix:QMAKE_RPATHDIR += "/$$EPT_INSTALL_LIB_RDIR/entropypianotuner"
 
     target.path = $$EPT_INSTALL_BIN_DIR