diff --git a/programs/util.h b/programs/util.h
index e69c47dd2..4e3586588 100644
--- a/programs/util.h
+++ b/programs/util.h
@@ -157,9 +157,9 @@ static int g_utilDisplayLevel;
 #else   /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */
     typedef clock_t UTIL_time_t;
     #define UTIL_TIME_INITIALIZER 0
-    UTIL_time_t UTIL_getTime(void) { return clock(); }
-    U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
-    U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
+    UTIL_time_t UTIL_getTime(void);
+    U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd);
+    U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd);
 #endif
 
 #define SEC_TO_MICRO 1000000
diff --git a/tests/Makefile b/tests/Makefile
index 8538cee7a..ffac3d4f8 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -177,7 +177,7 @@ zbufftest-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
 zbufftest-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/util.c $(PRGDIR)/datagen.c zbufftest.c
 	$(CC) $(CPPFLAGS) $(CFLAGS) $(filter %.c,$^) $(LDFLAGS) -o $@$(EXT)
 
-ZSTREAM_LOCAL_FILES := $(PRGDIR)/datagen.c seqgen.c zstreamtest.c
+ZSTREAM_LOCAL_FILES := $(PRGDIR)/datagen.c $(PRGDIR)/util.c seqgen.c zstreamtest.c
 ZSTREAM_PROPER_FILES := $(ZDICT_FILES) $(ZSTREAM_LOCAL_FILES)
 ZSTREAMFILES := $(ZSTD_FILES) $(ZSTREAM_PROPER_FILES)
 zstreamtest32 : CFLAGS += -m32
@@ -222,7 +222,7 @@ legacy : CPPFLAGS += -I$(ZSTDDIR)/legacy -DZSTD_LEGACY_SUPPORT=4
 legacy : $(ZSTD_FILES) $(wildcard $(ZSTDDIR)/legacy/*.c) legacy.c
 	$(CC) $(FLAGS) $^ -o $@$(EXT)
 
-decodecorpus : $(filter-out zstdc_zstd_compress.o, $(ZSTD_OBJECTS)) $(ZDICT_FILES) decodecorpus.c
+decodecorpus : $(filter-out zstdc_zstd_compress.o, $(ZSTD_OBJECTS)) $(ZDICT_FILES) $(PRGDIR)/util.c decodecorpus.c
 	$(CC) $(FLAGS) $^ -o $@$(EXT) -lm
 
 symbols  : symbols.c zstd-dll