diff --git a/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/factory.js b/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/factory.js
index d9d74dae0a1f..b2427c2bb1fa 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/factory.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/factory.js
@@ -21,7 +21,6 @@
 // MODULES //
 
 var constantFunction = require( '@stdlib/utils/constant-function' );
-var isProbability = require( '@stdlib/math/base/assert/is-probability' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var exp = require( '@stdlib/math/base/special/exp' );
 var ln = require( '@stdlib/math/base/special/ln' );
@@ -41,7 +40,7 @@ var ln = require( '@stdlib/math/base/special/ln' );
 * // returns ~0.783
 */
 function factory( p ) {
-	if ( !isProbability( p ) ) {
+	if ( isnan( p ) || p < 0.0 || p > 1.0 ) {
 		return constantFunction( NaN );
 	}
 	return mgf;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/main.js b/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/main.js
index 8126d1911512..956345a3cc36 100644
--- a/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/main.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/geometric/mgf/lib/main.js
@@ -20,7 +20,6 @@
 
 // MODULES //
 
-var isProbability = require( '@stdlib/math/base/assert/is-probability' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var exp = require( '@stdlib/math/base/special/exp' );
 var ln = require( '@stdlib/math/base/special/ln' );
@@ -67,7 +66,7 @@ var ln = require( '@stdlib/math/base/special/ln' );
 function mgf( t, p ) {
 	var et;
 	var q;
-	if ( isnan( t ) || !isProbability( p ) ) {
+	if ( isnan( t ) || isnan( p ) || p < 0.0 || p > 1.0 ) {
 		return NaN;
 	}
 	q = 1.0 - p;