diff --git a/code/qcommon/vm_x86_64.c b/code/qcommon/vm_x86_64.c
index 512a303c..e92c3778 100644
--- a/code/qcommon/vm_x86_64.c
+++ b/code/qcommon/vm_x86_64.c
@@ -554,6 +554,7 @@ void VM_Compile( vm_t *vm, vmHeader_t *header ) {
 				emit("push %%r8");
 				emit("push %%r9");
 				emit("push %%r10");
+				emit("push %%r10"); // align!
 				emit("negl %%eax");        // convert to actual number
 				emit("decl %%eax");
 				                           // first argument already in rdi
@@ -561,6 +562,7 @@ void VM_Compile( vm_t *vm, vmHeader_t *header ) {
 				emit("movq $%lu, %%rax", (unsigned long)callAsmCall);
 				emit("callq *%%rax");
 				emit("pop %%r10");
+				emit("pop %%r10");
 				emit("pop %%r9");
 				emit("pop %%r8");
 				emit("pop %%rdi");