1 files changed, 4 insertions, 0 deletions
diff --git a/write.c b/write.c
index e68b70c..d86ce5f 100644
--- a/write.c
+++ b/write.c
@@ -758,6 +758,10 @@ writeEBLC(FILE* out, FontPtr font)
             int offset;
 
             location = ftell(out);
+            if (location == -1) {
+                perror("Couldn't ftell");
+                return -1;
+            }
             rc = fseek(out, table->location + 4, SEEK_SET);
             if(rc != 0) {
                 perror("Couldn't seek");