Index: src/OFDate.m
==================================================================
--- src/OFDate.m
+++ src/OFDate.m
@@ -34,11 +34,11 @@
 static OFMutex *mutex;
 #endif
 
 #ifdef HAVE_GMTIME_R
 # define GMTIME_RET(field)						  \
-	time_t sec_ = sec;						  \
+	time_t sec_ = (time_t)sec;					  \
 	struct tm tm;							  \
 									  \
 	if (sec != sec_)						  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
@@ -45,11 +45,11 @@
 	if (gmtime_r(&sec_, &tm) == NULL)				  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
 	return tm.field;
 # define LOCALTIME_RET(field)						  \
-	time_t sec_ = sec;						  \
+	time_t sec_ = (time_t)sec;					  \
 	struct tm tm;							  \
 									  \
 	if (sec != sec_)						  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
@@ -58,11 +58,11 @@
 									  \
 	return tm.field;
 #else
 # ifdef OF_THREADS
 #  define GMTIME_RET(field)						  \
-	time_t sec_ = sec;						  \
+	time_t sec_ = (time_t)sec;					  \
 	struct tm *tm;							  \
 									  \
 	if (sec != sec_)						  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
@@ -75,11 +75,11 @@
 		return tm->field;					  \
 	} @finally {							  \
 		[mutex unlock];						  \
 	}
 #  define LOCALTIME_RET(field)						  \
-	time_t sec_ = sec;						  \
+	time_t sec_ = (time_t)sec;					  \
 	struct tm *tm;							  \
 									  \
 	if (sec != sec_)						  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
@@ -93,11 +93,11 @@
 	} @finally {							  \
 		[mutex unlock];						  \
 	}
 # else
 #  define GMTIME_RET(field)						  \
-	time_t sec_ = sec;						  \
+	time_t sec_ = (time_t)sec;					  \
 	struct tm *tm;							  \
 									  \
 	if (sec != sec_)						  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
@@ -104,11 +104,11 @@
 	if ((tm = gmtime(&sec_)) == NULL)				  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
 	return tm->field;
 #  define LOCALTIME_RET(field)						  \
-	time_t sec_ = sec;						  \
+	time_t sec_ = (time_t)sec;					  \
 	struct tm *tm;							  \
 									  \
 	if (sec != sec_)						  \
 		@throw [OFOutOfRangeException newWithClass: isa];	  \
 									  \
@@ -190,11 +190,11 @@
 		[self release];
 		@throw [OFInitializationFailedException newWithClass: c];
 	}
 
 	return [self initWithTimeIntervalSince1970: t.tv_sec
-				      microseconds: t.tv_usec];
+				      microseconds: (uint32_t)t.tv_usec];
 }
 
 - initWithTimeIntervalSince1970: (int64_t)sec_
 {
 	return [self initWithTimeIntervalSince1970: sec_
@@ -344,11 +344,11 @@
 }
 
 - (OFString*)dateStringWithFormat: (OFString*)fmt
 {
 	OFString *ret;
-	time_t sec_ = sec;
+	time_t sec_ = (time_t)sec;
 	struct tm tm;
 	char *buf;
 
 	if (sec != sec_)
 		@throw [OFOutOfRangeException newWithClass: isa];
@@ -390,11 +390,11 @@
 }
 
 - (OFString*)localDateStringWithFormat: (OFString*)fmt
 {
 	OFString *ret;
-	time_t sec_ = sec;
+	time_t sec_ = (time_t)sec;
 	struct tm tm;
 	char *buf;
 
 	if (sec != sec_)
 		@throw [OFOutOfRangeException newWithClass: isa];

Index: src/objc_sync.m
==================================================================
--- src/objc_sync.m
+++ src/objc_sync.m
@@ -36,11 +36,11 @@
 	of_mutex_t	 mutex;
 };
 
 static of_mutex_t mutex;
 static struct locks_s *locks = NULL;
-static size_t num_locks = 0;
+static ssize_t num_locks = 0;
 
 #define SYNC_ERR(f)							\
 	{								\
 		fprintf(stderr, "WARNING: %s failed in line %d!\n"	\
 		    "WARNING: This might result in a race "		\
@@ -55,11 +55,11 @@
 }
 
 int
 objc_sync_enter(id obj)
 {
-	int i;
+	ssize_t i;
 
 	if (obj == nil)
 		return 0;
 
 	if (!of_mutex_lock(&mutex))
@@ -140,11 +140,11 @@
 }
 
 int
 objc_sync_exit(id obj)
 {
-	int i;
+	ssize_t i;
 
 	if (obj == nil)
 		return 0;
 
 	if (!of_mutex_lock(&mutex))