diff --git a/VERSION b/VERSION
index eb96883..7021ba0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.489
+1.0.490
diff --git a/gf180mcu/magic/gf180mcu.tcl b/gf180mcu/magic/gf180mcu.tcl
index 756337d..80035eb 100644
--- a/gf180mcu/magic/gf180mcu.tcl
+++ b/gf180mcu/magic/gf180mcu.tcl
@@ -539,6 +539,10 @@
                 # Convert m to ny
 		dict set pdkparams ny $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -1132,6 +1136,10 @@
                 # Convert m to ny
 		dict set pdkparams ny $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -1959,6 +1967,10 @@
 		set value [magic::3digitpastdecimal $value]
 		dict set pdkparams [string tolower $canonkey] $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -3358,6 +3370,10 @@
 		    dict set pdkparams [string tolower $key] $value
 		}
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -4662,6 +4678,10 @@
 	    m {
 		 dict set pdkparams nx $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
diff --git a/sky130/magic/sky130.tcl b/sky130/magic/sky130.tcl
index 4f49f09..736e82a 100644
--- a/sky130/magic/sky130.tcl
+++ b/sky130/magic/sky130.tcl
@@ -971,6 +971,10 @@
                 # Convert m to ny
 		dict set pdkparams ny $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -2021,6 +2025,10 @@
                 # Convert m to ny
 		dict set pdkparams ny $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -3006,6 +3014,10 @@
 		set value [magic::3digitpastdecimal $value]
 		dict set pdkparams [string tolower $key] $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams
@@ -5404,6 +5416,10 @@
 		# Adjustment ot W will be handled below
 		dict set pdkparams [string tolower $key] $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
 
@@ -7433,6 +7449,10 @@
 	    m {
 		 dict set pdkparams nx $value
 	    }
+	    default {
+		# Allow unrecognized parameters to be passed unmodified
+		dict set pdkparams $key $value
+	    }
 	}
     }
     return $pdkparams