diff --git a/code/client/cl_cgame.c b/code/client/cl_cgame.c
index e87ce7a2..8e7a38e9 100644
--- a/code/client/cl_cgame.c
+++ b/code/client/cl_cgame.c
@@ -548,6 +548,7 @@ intptr_t CL_CgameSystemCalls( intptr_t *args ) {
 		return re.RegisterShaderNoMip( VMA(1) );
 	case CG_R_REGISTERFONT:
 		re.RegisterFont( VMA(1), args[2], VMA(3));
+		return 0;
 	case CG_R_CLEARSCENE:
 		re.ClearScene();
 		return 0;
diff --git a/code/server/sv_game.c b/code/server/sv_game.c
index c1bb2df8..7c8542eb 100644
--- a/code/server/sv_game.c
+++ b/code/server/sv_game.c
@@ -534,7 +534,7 @@ intptr_t SV_GameSystemCalls( intptr_t *args ) {
 
 	case BOTLIB_EA_ACTION:
 		botlib_export->ea.EA_Action( args[1], args[2] );
-		break;
+		return 0;
 	case BOTLIB_EA_GESTURE:
 		botlib_export->ea.EA_Gesture( args[1] );
 		return 0;
@@ -840,7 +840,7 @@ intptr_t SV_GameSystemCalls( intptr_t *args ) {
 	default:
 		Com_Error( ERR_DROP, "Bad game system trap: %ld", (long int) args[0] );
 	}
-	return -1;
+	return 0;
 }
 
 /*