diff --git a/src/include/ngspice/SIMD/simdop2.h b/src/include/ngspice/SIMD/simdop2.h
index af450db73..30c71b769 100644
--- a/src/include/ngspice/SIMD/simdop2.h
+++ b/src/include/ngspice/SIMD/simdop2.h
@@ -75,7 +75,18 @@ Vec2d _ZGVbN2vv_pow(Vec2d, Vec2d);
 #define vecN_pow vec2_pow
 #define vec2_fabs vecN_fabs
 
-#endif /* HAS_LIBMVEC */
+#else /* HAS_LIBMVEC */
+
+#define vec2_exp vecN_exp
+#define vec2_log vecN_log
+#define vec2_pow vecN_pow
+#define vec2_fabs vecN_fabs
+#ifndef USEX86INTRINSICS
+#define vec2_MAX vecN_MAX
+#define vec2_sqrt vecN_sqrt
+#endif
+
+#endif
 #endif /* not USE_LIBSLEEF */
 
 #ifdef USE_SERIAL_FORM
diff --git a/src/include/ngspice/SIMD/simdop4.h b/src/include/ngspice/SIMD/simdop4.h
index 71234efd4..87b346bb2 100644
--- a/src/include/ngspice/SIMD/simdop4.h
+++ b/src/include/ngspice/SIMD/simdop4.h
@@ -75,7 +75,19 @@ Vec4d _ZGVdN4vv_pow(Vec4d, Vec4d);
 #define vecN_pow vec4_pow
 #define vec4_fabs vecN_fabs
 
-#endif /* HAS_LIBMVEC */
+#else /* HAS_LIBMVEC */
+
+#define vec4_exp vecN_exp
+#define vec4_log vecN_log
+#define vec4_pow vecN_pow
+#define vec4_fabs vecN_fabs
+#ifndef USEX86INTRINSICS
+#define vec4_MAX vecN_MAX
+#define vec4_sqrt vecN_sqrt
+#endif
+
+#endif
+
 #endif /* not USE_LIBSLEEF */
 
 #ifdef USE_SERIAL_FORM
diff --git a/src/include/ngspice/SIMD/simdop8.h b/src/include/ngspice/SIMD/simdop8.h
index 094d8ade2..6acf265dc 100644
--- a/src/include/ngspice/SIMD/simdop8.h
+++ b/src/include/ngspice/SIMD/simdop8.h
@@ -51,10 +51,12 @@
 
 #define vec8_exp vecN_exp
 #define vec8_log vecN_log
-#define vec8_MAX vecN_MAX
-#define vec8_sqrt vecN_sqrt
 #define vec8_fabs vecN_fabs
 #define vec8_pow vecN_pow
+#ifndef USEX86INTRINSICS
+#define vec8_MAX vecN_MAX
+#define vec8_sqrt vecN_sqrt
+#endif
 
 #endif /* USE_LIBSLEEF */