diff --git a/interface/gemm.c b/interface/gemm.c
index db72d6b4a..23cca6eb7 100644
--- a/interface/gemm.c
+++ b/interface/gemm.c
@@ -143,8 +143,11 @@ void NAME(char *TRANSA, char *TRANSB,
   IFLOAT *buffer;
   IFLOAT *sa, *sb;
 
-#ifdef SMP
+#if defined (SMP) || defined(SMALL_MATRIX_OPT)
   double MNK;
+#endif
+
+#ifdef SMP
 #ifndef COMPLEX
 #ifdef XDOUBLE
   int mode  =  BLAS_XDOUBLE | BLAS_REAL;
@@ -265,8 +268,11 @@ void CNAME(enum CBLAS_ORDER order, enum CBLAS_TRANSPOSE TransA, enum CBLAS_TRANS
   XFLOAT *buffer;
   XFLOAT *sa, *sb;
 
-#ifdef SMP
+#if defined (SMP) || defined(SMALL_MATRIX_OPT)
   double MNK;
+#endif
+
+#ifdef SMP
 #ifndef COMPLEX
 #ifdef XDOUBLE
   int mode  =  BLAS_XDOUBLE | BLAS_REAL;
@@ -432,7 +438,9 @@ void CNAME(enum CBLAS_ORDER order, enum CBLAS_TRANSPOSE TransA, enum CBLAS_TRANS
 
   FUNCTION_PROFILE_START();
 
+#if defined(SMP) || defined(SMALL_MATRIX_OPT)
   MNK = (double) args.m * (double) args.n * (double) args.k;
+#endif
 
 #ifdef SMALL_MATRIX_OPT
 #if !defined(COMPLEX)