1 files changed, 1 insertions, 1 deletions

diff --git a/src/lj_ctype.h b/src/lj_ctype.h
index 7953654f..7c3b667c 100644
--- a/src/lj_ctype.h
+++ b/src/lj_ctype.h
@@ -155,7 +155,7 @@ typedef struct CType {
 #define CCALL_MAX_GPR           8
 #define CCALL_MAX_FPR           8
 
-typedef LJ_ALIGN(8) union FPRCBArg { double d; float f; } FPRCBArg;
+typedef LJ_ALIGN(8) union FPRCBArg { double d; float f[2]; } FPRCBArg;
 
 /* C callback state. Defined here, to avoid dragging in lj_ccall.h. */