diff --git a/gradle.properties b/gradle.properties
index 0dac8a66d..ab207117b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -33,13 +33,13 @@
 #randvar.jni.build
 
 # Path to `include/unuran.h` and to `lib/libunuran.a`.
-#unuran.prefix = "/opt/unuran"
+#unuran.prefix = /opt/unuran
 
 # Equivalent to `unuran.prefix` for each target platform when cross-compilation
 # is enabled (with the `crossCompile` property).
 # Both properties default to `unuran.prefix`.
-#unuran.prefix.linux64 = "/opt/unuran"
-#unuran.prefix.win32   = "/opt/unuran-mingw32"
+#unuran.prefix.linux64 = /opt/unuran
+#unuran.prefix.win32   = /opt/unuran-mingw32
 
 
 ########################################################################