diff --git a/libcortex_a9/src/fpu.rs b/libcortex_a9/src/fpu.rs
index c4dd568..4424330 100644
--- a/libcortex_a9/src/fpu.rs
+++ b/libcortex_a9/src/fpu.rs
@@ -6,6 +6,7 @@ pub fn enable_fpu() {
             mrc p15, 0, r1, c1, c0, 2
             orr r1, r1, (0b1111<<20)
             mcr p15, 0, r1, c1, c0, 2
+            isb
 
             vmrs r1, fpexc
             orr r1, r1, (1<<30)