diff --git a/lib/libpmc/libpmc.c b/lib/libpmc/libpmc.c
index 8922dd8c0e0..1d86a828120 100644
--- a/lib/libpmc/libpmc.c
+++ b/lib/libpmc/libpmc.c
@@ -2695,7 +2695,8 @@ pmc_init(void)
 	 */
 	cpu_has_iaf_counters = 0;
 	for (t = 0; t < cpu_info.pm_nclass; t++)
-		if (cpu_info.pm_classes[t].pm_class == PMC_CLASS_IAF)
+		if (cpu_info.pm_classes[t].pm_class == PMC_CLASS_IAF &&
+		    cpu_info.pm_classes[t].pm_num > 0)
 			cpu_has_iaf_counters = 1;
 #endif
 
@@ -2708,9 +2709,8 @@ pmc_init(void)
 
 #define	PMC_MDEP_INIT_INTEL_V2(C) do {					\
 		PMC_MDEP_INIT(C);					\
-		if (cpu_has_iaf_counters) 				\
-			pmc_class_table[n++] = &iaf_class_table_descr;	\
-		else							\
+		pmc_class_table[n++] = &iaf_class_table_descr;		\
+		if (!cpu_has_iaf_counters) 				\
 			pmc_mdep_event_aliases =			\
 				C##_aliases_without_iaf;		\
 		pmc_class_table[n] = &C##_class_table_descr;		\
diff --git a/sys/dev/hwpmc/hwpmc_core.c b/sys/dev/hwpmc/hwpmc_core.c
index 7c4476d8f09..01bd482bbb7 100644
--- a/sys/dev/hwpmc/hwpmc_core.c
+++ b/sys/dev/hwpmc/hwpmc_core.c
@@ -2234,21 +2234,8 @@ pmc_core_initialize(struct pmc_mdep *md, int maxcpu)
 		core_iaf_npmc = cpuid[CORE_CPUID_EDX] & 0x1F;
 		core_iaf_width = (cpuid[CORE_CPUID_EDX] >> 5) & 0xFF;
 
-		if (core_iaf_npmc > 0) {
-			iaf_initialize(md, maxcpu, core_iaf_npmc,
-			    core_iaf_width);
-			core_pmcmask |= ((1ULL << core_iaf_npmc) - 1) <<
-			    IAF_OFFSET;
-		} else {
-			/*
-			 * Adjust the number of classes exported to
-			 * user space.
-			 */
-			md->pmd_nclass--;
-			KASSERT(md->pmd_nclass == 2,
-			    ("[core,%d] unexpected nclass %d", __LINE__,
-				md->pmd_nclass));
-		}
+		iaf_initialize(md, maxcpu, core_iaf_npmc, core_iaf_width);
+		core_pmcmask |= ((1ULL << core_iaf_npmc) - 1) << IAF_OFFSET;
 	}
 
 	PMCDBG(MDP,INI,1,"core-init pmcmask=0x%jx iafri=%d", core_pmcmask,