diff --git a/makepanda/makepandacore.py b/makepanda/makepandacore.py
index 8c870ebc78..c4f79494da 100644
--- a/makepanda/makepandacore.py
+++ b/makepanda/makepandacore.py
@@ -952,8 +952,8 @@ def PkgEnable(pkg, pkgconfig = None, libs = None, incs = None, defs = None, fram
             if (l.startswith("lib")):
                 libname = l[3:]
             # This is for backward compatibility - in the thirdparty dir, we kept some libs with "panda" prefix, like libpandatiff.
-            if (len(glob.glob(THIRDPARTYLIBS + pkg.lower() + "/lib/libpanda%.*" % libname)) > 0 and
-                len(glob.glob(THIRDPARTYLIBS + pkg.lower() + "/lib/lib%.*" % libname)) == 0):
+            if (len(glob.glob(THIRDPARTYLIBS + pkg.lower() + "/lib/libpanda%s.*" % libname)) > 0 and
+                len(glob.glob(THIRDPARTYLIBS + pkg.lower() + "/lib/lib%s.*" % libname)) == 0):
                 libname = "panda" + libname
             LibName(pkg, libname)
         for d, v in defs.values():