--- a/modules/libmar/sign/mar_sign.c
+++ b/modules/libmar/sign/mar_sign.c
@@ -528,16 +528,19 @@ extract_signature(const char *src, uint3
   signatureCount = ntohl(signatureCount);
   if (sigIndex >= signatureCount) {
     fprintf(stderr, "ERROR: Signature index was out of range\n");
     goto failure;
   }
 
   /* Skip to the correct signature */
   for (i = 0; i <= sigIndex; i++) {
+    /* Avoid leaking while skipping signatures */
+    free(extractedSignature);
+
     /* skip past the signature algorithm ID */
     if (fseeko(fpSrc, sizeof(uint32_t), SEEK_CUR)) {
       fprintf(stderr, "ERROR: Could not seek past sig algorithm ID.\n");
       goto failure;
     }
 
     /* Get the signature length */
     if (fread(&signatureLen, sizeof(signatureLen), 1, fpSrc) != 1) {