diff --git a/dtool/Config.pp b/dtool/Config.pp
index 3965a815b9..7a677f2f3d 100644
--- a/dtool/Config.pp
+++ b/dtool/Config.pp
@@ -138,8 +138,8 @@
 #defer HAVE_PYTHON $[isdir $[PYTHON_IPATH]]
 
 // Is NSPR installed, and where?
-#define NSPR_IPATH /usr/local/include/nspr
-#define NSPR_LPATH /usr/local/lib
+#define NSPR_IPATH /usr/include/nspr
+#define NSPR_LPATH
 #define NSPR_LIBS nspr4
 #defer HAVE_NSPR $[libtest $[NSPR_LPATH],$[NSPR_LIBS]]