Index: src/OFProcess.h
==================================================================
--- src/OFProcess.h
+++ src/OFProcess.h
@@ -40,11 +40,11 @@
 {
 #ifndef _WIN32
 	pid_t pid;
 	int readPipe[2], writePipe[2];
 #else
-	HANDLE readPipe[2], writePipe[2];
+	HANDLE process, readPipe[2], writePipe[2];
 #endif
 	int status;
 	BOOL atEndOfStream;
 }
 

Index: src/OFProcess.m
==================================================================
--- src/OFProcess.m
+++ src/OFProcess.m
@@ -19,10 +19,11 @@
 #include <stdlib.h>
 #include <string.h>
 
 #ifndef _WIN32
 # include <unistd.h>
+# include <signal.h>
 # include <sys/wait.h>
 #endif
 
 #ifdef __MACH__
 # include <crt_externs.h>
@@ -260,11 +261,11 @@
 			[self freeMemory: argumentsCopy];
 		}
 
 		objc_autoreleasePoolPop(pool);
 
-		CloseHandle(pi.hProcess);
+		process = pi.hProcess;
 		CloseHandle(pi.hThread);
 
 		CloseHandle(readPipe[1]);
 		CloseHandle(writePipe[0]);
 #endif
@@ -460,12 +461,14 @@
 	if (readPipe[0] != -1)
 		close(readPipe[0]);
 	if (writePipe[1] != -1)
 		close(writePipe[1]);
 
-	if (pid != -1)
+	if (pid != -1) {
+		kill(pid, SIGKILL);
 		waitpid(pid, &status, WNOHANG);
+	}
 
 	pid = -1;
 	readPipe[0] = -1;
 	writePipe[1] = -1;
 #else
@@ -472,10 +475,16 @@
 	if (readPipe[0] != NULL)
 		CloseHandle(readPipe[0]);
 	if (writePipe[1] != NULL)
 		CloseHandle(writePipe[1]);
 
+	if (process != INVALID_HANDLE_VALUE) {
+		TerminateProcess(process, 0);
+		CloseHandle(process);
+	}
+
+	process = INVALID_HANDLE_VALUE;
 	readPipe[0] = NULL;
 	writePipe[1] = NULL;
 #endif
 }
 @end