diff --git a/include/mbedtls/sha3.h b/include/mbedtls/sha3.h
index 1fbcc7aa2f..8eb0268832 100644
--- a/include/mbedtls/sha3.h
+++ b/include/mbedtls/sha3.h
@@ -55,13 +55,6 @@ typedef enum {
 } mbedtls_sha3_id;
 
 struct mbedtls_sha3_context;
-typedef struct mbedtls_sha3_family_functions {
-    mbedtls_sha3_id id;
-
-    uint16_t r;
-    uint16_t olen;
-}
-mbedtls_sha3_family_functions;
 
 /**
  * \brief          The SHA-3 context structure.
diff --git a/library/sha3.c b/library/sha3.c
index b8abf9d321..c5ce1c669f 100644
--- a/library/sha3.c
+++ b/library/sha3.c
@@ -38,6 +38,14 @@
 
 #define XOR_BYTE 0x6
 
+typedef struct mbedtls_sha3_family_functions {
+    mbedtls_sha3_id id;
+
+    uint16_t r;
+    uint16_t olen;
+}
+mbedtls_sha3_family_functions;
+
 /*
  * List of supported SHA-3 families
  */