diff --git a/programs/fuzz/common.c b/programs/fuzz/common.c
index 4d58402..1af2446 100644
--- a/programs/fuzz/common.c
+++ b/programs/fuzz/common.c
@@ -5,15 +5,17 @@
 #include <stdlib.h>
 #include "mbedtls/ctr_drbg.h"
 
+#if defined(MBEDTLS_HAVE_TIME)
 mbedtls_time_t dummy_constant_time( mbedtls_time_t* time )
 {
     (void) time;
     return 0x5af2a056;
 }
+#endif
 
 void dummy_init()
 {
-#if defined(MBEDTLS_PLATFORM_TIME_ALT)
+#if (defined(MBEDTLS_HAVE_TIME) && defined(MBEDTLS_PLATFORM_TIME_ALT))
     mbedtls_platform_set_time( dummy_constant_time );
 #else
     fprintf(stderr, "Warning: fuzzing without constant time\n");
diff --git a/programs/fuzz/common.h b/programs/fuzz/common.h
index 5586c06..37495a6 100644
--- a/programs/fuzz/common.h
+++ b/programs/fuzz/common.h
@@ -1,4 +1,13 @@
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "mbedtls/mbedtls_config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_HAVE_TIME)
 #include "mbedtls/platform_time.h"
+#endif
+#include <stddef.h>
 #include <stdint.h>
 
 typedef struct fuzzBufferOffset
@@ -8,7 +17,9 @@
     size_t Offset;
 } fuzzBufferOffset_t;
 
+#if defined(MBEDTLS_HAVE_TIME)
 mbedtls_time_t dummy_constant_time( mbedtls_time_t* time );
+#endif
 void dummy_init();
 
 int dummy_send( void *ctx, const unsigned char *buf, size_t len );