Index: build/chrome/cackey-chrome-test.c
==================================================================
--- build/chrome/cackey-chrome-test.c
+++ build/chrome/cackey-chrome-test.c
@@ -30,19 +30,25 @@
 
 			printf("%s: ", pinPrompt);
 			fflush(stdout);
 
 			free(pinPrompt);
+
+			pinPrompt = NULL;
 
 			fgets(pin, sizeof(pin), stdin);
 			while (strlen(pin) >= 1 && pin[strlen(pin) - 1] == '\n') {
 				pin[strlen(pin) - 1] = '\0';
 			}
 
 			signLength = sizeof(signBuffer);
 			rvSign = cackey_chrome_signMessage(&certificates[idxCertificate], "Test", 4, signBuffer, &signLength, &pinPrompt, pin);
 		}
+
+		if (pinPrompt != NULL) {
+			free(pinPrompt);
+		}
 
 		printf("Signed message \"Test\": %lu bytes (return value = %i)\n", signLength, rvSign);
 	}
 
 	cackey_chrome_freeCertificates(certificates, numCertificates);