diff --git a/.github/workflows/compilation.yml b/.github/workflows/compilation.yml
index da18a92d..6982eb80 100644
--- a/.github/workflows/compilation.yml
+++ b/.github/workflows/compilation.yml
@@ -31,7 +31,7 @@ jobs:
 
     - name: Compile Examples
       run: |
-        cd src/samples && make -f Makefile.samples
+        cd src/samples && make -f Makefile.samples -j $(getconf _NPROCESSORS_ONLN)
     
     - name: Compress Samples folder folder
       run: |
diff --git a/build-and-install.sh b/build-and-install.sh
index 78ebeebb..1470f2de 100755
--- a/build-and-install.sh
+++ b/build-and-install.sh
@@ -19,7 +19,7 @@ make clean
 make -j $(getconf _NPROCESSORS_ONLN)
 
 ## Install pspsdk
-make install
+make install -j $(getconf _NPROCESSORS_ONLN)
 
 ## gcc needs to include libcglue libpthreadglue libpspprof libpsputility libpsprtc libpspnet_inet libpspnet_resolver libpspsdk libpspmodinfo libpspuser libpspkernel
 ## from pspsdk to be able to build executables, because they are part of the standard libraries
diff --git a/src/samples/debug/debugkb/main.c b/src/samples/debug/debugkb/main.c
index 58b24c4b..365dffd8 100644
--- a/src/samples/debug/debugkb/main.c
+++ b/src/samples/debug/debugkb/main.c
@@ -30,7 +30,7 @@ PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER | THREAD_ATTR_VFPU);
 #define setBackColor pspDebugScreenSetBackColor
 
 /* Exit callback */
-int exit_callback()
+int exit_callback(int count, int arg, void *argp)
 {
   sceKernelExitGame();