Index: src/exceptions/OFException.h
==================================================================
--- src/exceptions/OFException.h
+++ src/exceptions/OFException.h
@@ -166,11 +166,11 @@
  * @brief Returns a backtrace of when the exception was created or nil if no
  *	  backtrace is available.
  *
  * @return A backtrace of when the exception was created
  */
-- (nullable OFArray *)backtrace;
+- (nullable OFArray OF_GENERIC(OFString *) *)backtrace;
 @end
 
 #ifdef __cplusplus
 extern "C" {
 #endif

Index: src/exceptions/OFException.m
==================================================================
--- src/exceptions/OFException.m
+++ src/exceptions/OFException.m
@@ -268,14 +268,15 @@
 {
 	return [OFString stringWithFormat:
 	    @"An exception of type %@ occurred!", [self class]];
 }
 
-- (OFArray *)backtrace
+- (OFArray OF_GENERIC(OFString *) *)backtrace
 {
 #ifdef HAVE_DWARF_EXCEPTIONS
-	OFMutableArray *backtrace = [OFMutableArray array];
+	OFMutableArray OF_GENERIC(OFString *) *backtrace =
+	    [OFMutableArray array];
 	void *pool = objc_autoreleasePoolPush();
 
 	for (uint8_t i = 0;
 	    i < OF_BACKTRACE_SIZE && _backtrace[i] != NULL; i++) {
 # ifdef HAVE_DLADDR