diff --git a/interface/zrotg.c b/interface/zrotg.c
index 5beda4796..cf22f62f6 100644
--- a/interface/zrotg.c
+++ b/interface/zrotg.c
@@ -31,7 +31,7 @@ void CNAME(void *VDA, void *VDB, FLOAT *C, void *VS) {
   FLOAT db_i = *(DB+1);
   //long double r;
   FLOAT S1[2];
-  FLOAT R=[2];
+  FLOAT R[2];
   long double d;
 
   FLOAT ada =  da_r * da_r + da_i * da_i;