diff --git a/api/baseapi.cpp b/api/baseapi.cpp
index b4f06a790..cd9e4aae1 100644
--- a/api/baseapi.cpp
+++ b/api/baseapi.cpp
@@ -393,6 +393,7 @@ void TessBaseAPI::GetAvailableLanguagesAsVector(
           }
         }
       }
+      closedir(dir);
     }
 #endif
   }
diff --git a/classify/mastertrainer.cpp b/classify/mastertrainer.cpp
index 7726814fa..8a49baf06 100644
--- a/classify/mastertrainer.cpp
+++ b/classify/mastertrainer.cpp
@@ -408,6 +408,7 @@ bool MasterTrainer::LoadXHeights(const char* filename) {
   }
   if (xheight_count == 0) {
     fprintf(stderr, "No valid xheights in %s!\n", filename);
+    fclose(f);
     return false;
   }
   int mean_xheight = DivRounded(total_xheight, xheight_count);
diff --git a/cube/char_samp_set.cpp b/cube/char_samp_set.cpp
index 65caa397a..2a495095e 100644
--- a/cube/char_samp_set.cpp
+++ b/cube/char_samp_set.cpp
@@ -133,6 +133,7 @@ FILE *CharSampSet::CreateCharDumpFile(string file_name) {
   // read and verify marker
   val32 = 0xfefeabd0;
   if (fwrite(&val32, 1, sizeof(val32), fp) != sizeof(val32)) {
+    fclose(fp);
     return NULL;
   }
   return fp;