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-rw-r--r--prism/util/pm_string.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/prism/util/pm_string.h b/prism/util/pm_string.h
index d23792c0ba..e4a20558d3 100644
--- a/prism/util/pm_string.h
+++ b/prism/util/pm_string.h
@@ -9,6 +9,7 @@
#include "prism/defines.h"
#include <assert.h>
+#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>