Index: kernel/arch/ia32/src/cpu/cpu.c
===================================================================
--- kernel/arch/ia32/src/cpu/cpu.c	(revision bab75df6bdac0b39185034277416374a06d4b37f)
+++ kernel/arch/ia32/src/cpu/cpu.c	(revision 5e629ad488e0e5d27b616c452352f3cedc9f2db5)
@@ -71,10 +71,10 @@
 void fpu_disable(void)
 {
-	write_cr0(read_cr0() & ~CR0_TS);
+	write_cr0(read_cr0() | CR0_TS);
 }
 
 void fpu_enable(void)
 {
-	write_cr0(read_cr0() | CR0_TS);
+	write_cr0(read_cr0() & ~CR0_TS);
 }