diff --git a/src/cmd/eqn/e.h b/src/cmd/eqn/e.h
index f34c46cf..432f4eac 100644
--- a/src/cmd/eqn/e.h
+++ b/src/cmd/eqn/e.h
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
-#include <stdint.h>
+#include <inttypes.h>
 
 #undef sqrt
 #define sqrt p9_sqrt
diff --git a/src/lib9/fmt/plan9.h b/src/lib9/fmt/plan9.h
index 22fa7f0c..0872ac71 100644
--- a/src/lib9/fmt/plan9.h
+++ b/src/lib9/fmt/plan9.h
@@ -1,4 +1,4 @@
-#include <stdint.h>
+#include <inttypes.h>
 
 /*
  * compiler directive on Plan 9